text: # -*- coding: utf-8 -*-
  
  # Copyright 2020 Google LLC
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  #
  
  from collections import OrderedDict
  import os
  import re
  from typing import Callable, Dict, Sequence, Tuple, Type, Union
  import pkg_resources
  
  import google.api_core.client_options as ClientOptions  # type: ignore
  from google.api_core import exceptions  # type: ignore
  from google.api_core import gapic_v1  # type: ignore
  from google.api_core import retry as retries  # type: ignore
  from google.auth import credentials  # type: ignore
  from google.auth.transport import mtls  # type: ignore
  from google.auth.exceptions import MutualTLSChannelError  # type: ignore
  from google.oauth2 import service_account  # type: ignore
  
  from google.api_core import operation
  from google.api_core import operation_async
  from google.cloud.dialogflowcx_v3beta1.services.versions import pagers
  from google.cloud.dialogflowcx_v3beta1.types import flow
  from google.cloud.dialogflowcx_v3beta1.types import version
  from google.cloud.dialogflowcx_v3beta1.types import version as gcdc_version
  from google.protobuf import empty_pb2 as empty  # type: ignore
  from google.protobuf import field_mask_pb2 as field_mask  # type: ignore
  from google.protobuf import struct_pb2 as struct  # type: ignore
  from google.protobuf import timestamp_pb2 as timestamp  # type: ignore
  
  from .transports.base import VersionsTransport, DEFAULT_CLIENT_INFO
  from .transports.grpc import VersionsGrpcTransport
  from .transports.grpc_asyncio import VersionsGrpcAsyncIOTransport
  
  
  class VersionsClientMeta(type):
      """Metaclass for the Versions client.
  
      This provides class-level methods for building and retrieving
      support objects (e.g. transport) without polluting the client instance
      objects.
      """
  
      _transport_registry = OrderedDict()  # type: Dict[str, Type[VersionsTransport]]
      _transport_registry["grpc"] = VersionsGrpcTransport
      _transport_registry["grpc_asyncio"] = VersionsGrpcAsyncIOTransport
  
      def get_transport_class(cls, label: str = None,) -> Type[VersionsTransport]:
          """Return an appropriate transport class.
  
          Args:
              label: The name of the desired transport. If none is
                  provided, then the first transport in the registry is used.
  
          Returns:
              The transport class to use.
          """
          # If a specific transport is requested, return that one.
          if label:
              return cls._transport_registry[label]
  
          # No transport is requested; return the default (that is, the first one
          # in the dictionary).
          return next(iter(cls._transport_registry.values()))
  
  
  class VersionsClient(metaclass=VersionsClientMeta):
      """Service for managing
      [Versions][google.cloud.dialogflow.cx.v3beta1.Version].
      """
  
      @staticmethod
      def _get_default_mtls_endpoint(api_endpoint):
          """Convert api endpoint to mTLS endpoint.
          Convert "*.sandbox.googleapis.com" and "*.googleapis.com" to
          "*.mtls.sandbox.googleapis.com" and "*.mtls.googleapis.com" respectively.
          Args:
              api_endpoint (Optional[str]): the api endpoint to convert.
          Returns:
              str: converted mTLS api endpoint.
          """
          if not api_endpoint:
              return api_endpoint
  
          mtls_endpoint_re = re.compile(
              r"(?P<name>[^.]+)(?P<mtls>\.mtls)?(?P<sandbox>\.sandbox)?(?P<googledomain>\.googleapis\.com)?"
          )
  
          m = mtls_endpoint_re.match(api_endpoint)
          name, mtls, sandbox, googledomain = m.groups()
          if mtls or not googledomain:
              return api_endpoint
  
          if sandbox:
              return api_endpoint.replace(
                  "sandbox.googleapis.com", "mtls.sandbox.googleapis.com"
              )
  
          return api_endpoint.replace(".googleapis.com", ".mtls.googleapis.com")
  
      DEFAULT_ENDPOINT = "dialogflow.googleapis.com"
      DEFAULT_MTLS_ENDPOINT = _get_default_mtls_endpoint.__func__(  # type: ignore
          DEFAULT_ENDPOINT
      )
  
      @classmethod
      def from_service_account_file(cls, filename: str, *args, **kwargs):
          """Creates an instance of this client using the provided credentials
          file.
  
          Args:
              filename (str): The path to the service account private key json
                  file.
              args: Additional arguments to pass to the constructor.
              kwargs: Additional arguments to pass to the constructor.
  
          Returns:
              {@api.name}: The constructed client.
          """
          credentials = service_account.Credentials.from_service_account_file(filename)
          kwargs["credentials"] = credentials
          return cls(*args, **kwargs)
  
      from_service_account_json = from_service_account_file
  
      @staticmethod
      def version_path(
          project: str, location: str, agent: str, flow: str, version: str,
      ) -> str:
          """Return a fully-qualified version string."""
          return "projects/{project}/locations/{location}/agents/{agent}/flows/{flow}/versions/{version}".format(
              project=project, location=location, agent=agent, flow=flow, version=version,
          )
  
      @staticmethod
      def parse_version_path(path: str) -> Dict[str, str]:
          """Parse a version path into its component segments."""
          m = re.match(
              r"^projects/(?P<project>.+?)/locations/(?P<location>.+?)/agents/(?P<agent>.+?)/flows/(?P<flow>.+?)/versions/(?P<version>.+?)$",
              path,
          )
          return m.groupdict() if m else {}
  
      def __init__(
          self,
          *,
          credentials: credentials.Credentials = None,
          transport: Union[str, VersionsTransport] = None,
          client_options: ClientOptions = None,
          client_info: gapic_v1.client_info.ClientInfo = DEFAULT_CLIENT_INFO,
      ) -> None:
          """Instantiate the versions client.
  
          Args:
              credentials (Optional[google.auth.credentials.Credentials]): The
                  authorization credentials to attach to requests. These
                  credentials identify the application to the service; if none
                  are specified, the client will attempt to ascertain the
                  credentials from the environment.
              transport (Union[str, ~.VersionsTransport]): The
                  transport to use. If set to None, a transport is chosen
                  automatically.
              client_options (ClientOptions): Custom options for the client. It
                  won't take effect if a ``transport`` instance is provided.
                  (1) The ``api_endpoint`` property can be used to override the
                  default endpoint provided by the client. GOOGLE_API_USE_MTLS
                  environment variable can also be used to override the endpoint:
                  "always" (always use the default mTLS endpoint), "never" (always
                  use the default regular endpoint, this is the default value for
                  the environment variable) and "auto" (auto switch to the default
                  mTLS endpoint if client SSL credentials is present). However,
                  the ``api_endpoint`` property takes precedence if provided.
                  (2) The ``client_cert_source`` property is used to provide client
                  SSL credentials for mutual TLS transport. If not provided, the
                  default SSL credentials will be used if present.
              client_info (google.api_core.gapic_v1.client_info.ClientInfo):	
                  The client info used to send a user-agent string along with	
                  API requests. If ``None``, then default info will be used.	
                  Generally, you only need to set this if you're developing	
                  your own client library.
  
          Raises:
              google.auth.exceptions.MutualTLSChannelError: If mutual TLS transport
                  creation failed for any reason.
          """
          if isinstance(client_options, dict):
              client_options = ClientOptions.from_dict(client_options)
          if client_options is None:
              client_options = ClientOptions.ClientOptions()
  
          if client_options.api_endpoint is None:
              use_mtls_env = os.getenv("GOOGLE_API_USE_MTLS", "never")
              if use_mtls_env == "never":
                  client_options.api_endpoint = self.DEFAULT_ENDPOINT
              elif use_mtls_env == "always":
                  client_options.api_endpoint = self.DEFAULT_MTLS_ENDPOINT
              elif use_mtls_env == "auto":
                  has_client_cert_source = (
                      client_options.client_cert_source is not None
                      or mtls.has_default_client_cert_source()
                  )
                  client_options.api_endpoint = (
                      self.DEFAULT_MTLS_ENDPOINT
                      if has_client_cert_source
                      else self.DEFAULT_ENDPOINT
                  )
              else:
                  raise MutualTLSChannelError(
                      "Unsupported GOOGLE_API_USE_MTLS value. Accepted values: never, auto, always"
                  )
  
          # Save or instantiate the transport.
          # Ordinarily, we provide the transport, but allowing a custom transport
          # instance provides an extensibility point for unusual situations.
          if isinstance(transport, VersionsTransport):
              # transport is a VersionsTransport instance.
              if credentials or client_options.credentials_file:
                  raise ValueError(
                      "When providing a transport instance, "
                      "provide its credentials directly."
                  )
              if client_options.scopes:
                  raise ValueError(
                      "When providing a transport instance, "
                      "provide its scopes directly."
                  )
              self._transport = transport
          else:
              Transport = type(self).get_transport_class(transport)
              self._transport = Transport(
                  credentials=credentials,
                  credentials_file=client_options.credentials_file,
                  host=client_options.api_endpoint,
                  scopes=client_options.scopes,
                  api_mtls_endpoint=client_options.api_endpoint,
                  client_cert_source=client_options.client_cert_source,
                  quota_project_id=client_options.quota_project_id,
                  client_info=client_info,
              )
  
      def list_versions(
          self,
          request: version.ListVersionsRequest = None,
          *,
          parent: str = None,
          retry: retries.Retry = gapic_v1.method.DEFAULT,
          timeout: float = None,
          metadata: Sequence[Tuple[str, str]] = (),
      ) -> pagers.ListVersionsPager:
          r"""Returns the list of all versions in the specified
          [Flow][google.cloud.dialogflow.cx.v3beta1.Flow].
  
          Args:
              request (:class:`~.version.ListVersionsRequest`):
                  The request object. The request message for
                  [Versions.ListVersions][google.cloud.dialogflow.cx.v3beta1.Versions.ListVersions].
              parent (:class:`str`):
                  Required. The
                  [Flow][google.cloud.dialogflow.cx.v3beta1.Flow] to list
                  all versions for. Format:
                  ``projects/<Project ID>/locations/<Location ID>/agents/<Agent ID>/flows/<Flow ID>``.
                  This corresponds to the ``parent`` field
                  on the ``request`` instance; if ``request`` is provided, this
                  should not be set.
  
              retry (google.api_core.retry.Retry): Designation of what errors, if any,
                  should be retried.
              timeout (float): The timeout for this request.
              metadata (Sequence[Tuple[str, str]]): Strings which should be
                  sent along with the request as metadata.
  
          Returns:
              ~.pagers.ListVersionsPager:
                  The response message for
                  [Versions.ListVersions][google.cloud.dialogflow.cx.v3beta1.Versions.ListVersions].
  
                  Iterating over this object will yield results and
                  resolve additional pages automatically.
  
          """
          # Create or coerce a protobuf request object.
          # Sanity check: If we got a request object, we should *not* have
          # gotten any keyword arguments that map to the request.
          has_flattened_params = any([parent])
          if request is not None and has_flattened_params:
              raise ValueError(
                  "If the `request` argument is set, then none of "
                  "the individual field arguments should be set."
              )
  
          # Minor optimization to avoid making a copy if the user passes
          # in a version.ListVersionsRequest.
          # There's no risk of modifying the input as we've already verified
          # there are no flattened fields.
          if not isinstance(request, version.ListVersionsRequest):
              request = version.ListVersionsRequest(request)
  
              # If we have keyword arguments corresponding to fields on the
              # request, apply these.
  
              if parent is not None:
                  request.parent = parent
  
          # Wrap the RPC method; this adds retry and timeout information,
          # and friendly error handling.
          rpc = self._transport._wrapped_methods[self._transport.list_versions]
  
          # Certain fields should be provided within the metadata header;
          # add these here.
          metadata = tuple(metadata) + (
              gapic_v1.routing_header.to_grpc_metadata((("parent", request.parent),)),
          )
  
          # Send the request.
          response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)
  
          # This method is paged; wrap the response in a pager, which provides
          # an `__iter__` convenience method.
          response = pagers.ListVersionsPager(
              method=rpc, request=request, response=response, metadata=metadata,
          )
  
          # Done; return the response.
          return response
  
      def get_version(
          self,
          request: version.GetVersionRequest = None,
          *,
          name: str = None,
          retry: retries.Retry = gapic_v1.method.DEFAULT,
          timeout: float = None,
          metadata: Sequence[Tuple[str, str]] = (),
      ) -> version.Version:
          r"""Retrieves the specified
          [Version][google.cloud.dialogflow.cx.v3beta1.Version].
  
          Args:
              request (:class:`~.version.GetVersionRequest`):
                  The request object. The request message for
                  [Versions.GetVersion][google.cloud.dialogflow.cx.v3beta1.Versions.GetVersion].
              name (:class:`str`):
                  Required. The name of the
                  [Version][google.cloud.dialogflow.cx.v3beta1.Version].
                  Format:
                  ``projects/<Project ID>/locations/<Location ID>/agents/<Agent ID>/flows/<Flow ID>/versions/<Version ID>``.
                  This corresponds to the ``name`` field
                  on the ``request`` instance; if ``request`` is provided, this
                  should not be set.
  
              retry (google.api_core.retry.Retry): Designation of what errors, if any,
                  should be retried.
              timeout (float): The timeout for this request.
              metadata (Sequence[Tuple[str, str]]): Strings which should be
                  sent along with the request as metadata.
  
          Returns:
              ~.version.Version:
                  Represents a version of a flow.
          """
          # Create or coerce a protobuf request object.
          # Sanity check: If we got a request object, we should *not* have
          # gotten any keyword arguments that map to the request.
          has_flattened_params = any([name])
          if request is not None and has_flattened_params:
              raise ValueError(
                  "If the `request` argument is set, then none of "
                  "the individual field arguments should be set."
              )
  
          # Minor optimization to avoid making a copy if the user passes
          # in a version.GetVersionRequest.
          # There's no risk of modifying the input as we've already verified
          # there are no flattened fields.
          if not isinstance(request, version.GetVersionRequest):
              request = version.GetVersionRequest(request)
  
              # If we have keyword arguments corresponding to fields on the
              # request, apply these.
  
              if name is not None:
                  request.name = name
  
          # Wrap the RPC method; this adds retry and timeout information,
          # and friendly error handling.
          rpc = self._transport._wrapped_methods[self._transport.get_version]
  
          # Certain fields should be provided within the metadata header;
          # add these here.
          metadata = tuple(metadata) + (
              gapic_v1.routing_header.to_grpc_metadata((("name", request.name),)),
          )
  
          # Send the request.
          response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)
  
          # Done; return the response.
          return response
  
      def create_version(
          self,
          request: gcdc_version.CreateVersionRequest = None,
          *,
          parent: str = None,
          version: gcdc_version.Version = None,
          retry: retries.Retry = gapic_v1.method.DEFAULT,
          timeout: float = None,
          metadata: Sequence[Tuple[str, str]] = (),
      ) -> operation.Operation:
          r"""Creates a [Version][google.cloud.dialogflow.cx.v3beta1.Version]
          in the specified
          [Flow][google.cloud.dialogflow.cx.v3beta1.Flow].
  
          Args:
              request (:class:`~.gcdc_version.CreateVersionRequest`):
                  The request object. The request message for
                  [Versions.CreateVersion][google.cloud.dialogflow.cx.v3beta1.Versions.CreateVersion].
              parent (:class:`str`):
                  Required. The
                  [Flow][google.cloud.dialogflow.cx.v3beta1.Flow] to
                  create an
                  [Version][google.cloud.dialogflow.cx.v3beta1.Version]
                  for. Format:
                  ``projects/<Project ID>/locations/<Location ID>/agents/<Agent ID>/flows/<Flow ID>``.
                  This corresponds to the ``parent`` field
                  on the ``request`` instance; if ``request`` is provided, this
                  should not be set.
              version (:class:`~.gcdc_version.Version`):
                  Required. The version to create.
                  This corresponds to the ``version`` field
                  on the ``request`` instance; if ``request`` is provided, this
                  should not be set.
  
              retry (google.api_core.retry.Retry): Designation of what errors, if any,
                  should be retried.
              timeout (float): The timeout for this request.
              metadata (Sequence[Tuple[str, str]]): Strings which should be
                  sent along with the request as metadata.
  
          Returns:
              ~.operation.Operation:
                  An object representing a long-running operation.
  
                  The result type for the operation will be
                  :class:``~.gcdc_version.Version``: Represents a version
                  of a flow.
  
          """
          # Create or coerce a protobuf request object.
          # Sanity check: If we got a request object, we should *not* have
          # gotten any keyword arguments that map to the request.
          has_flattened_params = any([parent, version])
          if request is not None and has_flattened_params:
              raise ValueError(
                  "If the `request` argument is set, then none of "
                  "the individual field arguments should be set."
              )
  
          # Minor optimization to avoid making a copy if the user passes
          # in a gcdc_version.CreateVersionRequest.
          # There's no risk of modifying the input as we've already verified
          # there are no flattened fields.
          if not isinstance(request, gcdc_version.CreateVersionRequest):
              request = gcdc_version.CreateVersionRequest(request)
  
              # If we have keyword arguments corresponding to fields on the
              # request, apply these.
  
              if parent is not None:
                  request.parent = parent
              if version is not None:
                  request.version = version
  
          # Wrap the RPC method; this adds retry and timeout information,
          # and friendly error handling.
          rpc = self._transport._wrapped_methods[self._transport.create_version]
  
          # Certain fields should be provided within the metadata header;
          # add these here.
          metadata = tuple(metadata) + (
              gapic_v1.routing_header.to_grpc_metadata((("parent", request.parent),)),
          )
  
          # Send the request.
          response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)
  
          # Wrap the response in an operation future.
          response = operation.from_gapic(
              response,
              self._transport.operations_client,
              gcdc_version.Version,
              metadata_type=gcdc_version.CreateVersionOperationMetadata,
          )
  
          # Done; return the response.
          return response
  
      def update_version(
          self,
          request: gcdc_version.UpdateVersionRequest = None,
          *,
          version: gcdc_version.Version = None,
          update_mask: field_mask.FieldMask = None,
          retry: retries.Retry = gapic_v1.method.DEFAULT,
          timeout: float = None,
          metadata: Sequence[Tuple[str, str]] = (),
      ) -> gcdc_version.Version:
          r"""Updates the specified
          [Version][google.cloud.dialogflow.cx.v3beta1.Version].
  
          Args:
              request (:class:`~.gcdc_version.UpdateVersionRequest`):
                  The request object. The request message for
                  [Versions.UpdateVersion][google.cloud.dialogflow.cx.v3beta1.Versions.UpdateVersion].
              version (:class:`~.gcdc_version.Version`):
                  Required. The version to update.
                  This corresponds to the ``version`` field
                  on the ``request`` instance; if ``request`` is provided, this
                  should not be set.
              update_mask (:class:`~.field_mask.FieldMask`):
                  Required. The mask to control which fields get updated.
                  Currently only ``description`` and ``display_name`` can
                  be updated.
                  This corresponds to the ``update_mask`` field
                  on the ``request`` instance; if ``request`` is provided, this
                  should not be set.
  
              retry (google.api_core.retry.Retry): Designation of what errors, if any,
                  should be retried.
              timeout (float): The timeout for this request.
              metadata (Sequence[Tuple[str, str]]): Strings which should be
                  sent along with the request as metadata.
  
          Returns:
              ~.gcdc_version.Version:
                  Represents a version of a flow.
          """
          # Create or coerce a protobuf request object.
          # Sanity check: If we got a request object, we should *not* have
          # gotten any keyword arguments that map to the request.
          has_flattened_params = any([version, update_mask])
          if request is not None and has_flattened_params:
              raise ValueError(
                  "If the `request` argument is set, then none of "
                  "the individual field arguments should be set."
              )
  
          # Minor optimization to avoid making a copy if the user passes
          # in a gcdc_version.UpdateVersionRequest.
          # There's no risk of modifying the input as we've already verified
          # there are no flattened fields.
          if not isinstance(request, gcdc_version.UpdateVersionRequest):
              request = gcdc_version.UpdateVersionRequest(request)
  
              # If we have keyword arguments corresponding to fields on the
              # request, apply these.
  
              if version is not None:
                  request.version = version
              if update_mask is not None:
                  request.update_mask = update_mask
  
          # Wrap the RPC method; this adds retry and timeout information,
          # and friendly error handling.
          rpc = self._transport._wrapped_methods[self._transport.update_version]
  
          # Certain fields should be provided within the metadata header;
          # add these here.
          metadata = tuple(metadata) + (
              gapic_v1.routing_header.to_grpc_metadata(
                  (("version.name", request.version.name),)
              ),
          )
  
          # Send the request.
          response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)
  
          # Done; return the response.
          return response
  
      def delete_version(
          self,
          request: version.DeleteVersionRequest = None,
          *,
          name: str = None,
          retry: retries.Retry = gapic_v1.method.DEFAULT,
          timeout: float = None,
          metadata: Sequence[Tuple[str, str]] = (),
      ) -> None:
          r"""Deletes the specified
          [Version][google.cloud.dialogflow.cx.v3beta1.Version].
  
          Args:
              request (:class:`~.version.DeleteVersionRequest`):
                  The request object. The request message for
                  [Versions.DeleteVersion][google.cloud.dialogflow.cx.v3beta1.Versions.DeleteVersion].
              name (:class:`str`):
                  Required. The name of the
                  [Version][google.cloud.dialogflow.cx.v3beta1.Version] to
                  delete. Format:
                  ``projects/<Project ID>/locations/<Location ID>/agents/<Agent ID>/flows/<Flow ID>/versions/<Version ID>``.
                  This corresponds to the ``name`` field
                  on the ``request`` instance; if ``request`` is provided, this
                  should not be set.
  
              retry (google.api_core.retry.Retry): Designation of what errors, if any,
                  should be retried.
              timeout (float): The timeout for this request.
              metadata (Sequence[Tuple[str, str]]): Strings which should be
                  sent along with the request as metadata.
          """
          # Create or coerce a protobuf request object.
          # Sanity check: If we got a request object, we should *not* have
          # gotten any keyword arguments that map to the request.
          has_flattened_params = any([name])
          if request is not None and has_flattened_params:
              raise ValueError(
                  "If the `request` argument is set, then none of "
                  "the individual field arguments should be set."
              )
  
          # Minor optimization to avoid making a copy if the user passes
          # in a version.DeleteVersionRequest.
          # There's no risk of modifying the input as we've already verified
          # there are no flattened fields.
          if not isinstance(request, version.DeleteVersionRequest):
              request = version.DeleteVersionRequest(request)
  
              # If we have keyword arguments corresponding to fields on the
              # request, apply these.
  
              if name is not None:
                  request.name = name
  
          # Wrap the RPC method; this adds retry and timeout information,
          # and friendly error handling.
          rpc = self._transport._wrapped_methods[self._transport.delete_version]
  
          # Certain fields should be provided within the metadata header;
          # add these here.
          metadata = tuple(metadata) + (
              gapic_v1.routing_header.to_grpc_metadata((("name", request.name),)),
          )
  
          # Send the request.
          rpc(
              request, retry=retry, timeout=timeout, metadata=metadata,
          )
  
      def load_version(
          self,
          request: version.LoadVersionRequest = None,
          *,
          name: str = None,
          retry: retries.Retry = gapic_v1.method.DEFAULT,
          timeout: float = None,
          metadata: Sequence[Tuple[str, str]] = (),
      ) -> operation.Operation:
          r"""Loads a specified version to draft version.
  
          Args:
              request (:class:`~.version.LoadVersionRequest`):
                  The request object. The request message for
                  [Versions.LoadVersion][google.cloud.dialogflow.cx.v3beta1.Versions.LoadVersion].
              name (:class:`str`):
                  Required. The
                  [Version][google.cloud.dialogflow.cx.v3beta1.Version] to
                  be loaded to draft version. Format:
                  ``projects/<Project ID>/locations/<Location ID>/agents/<Agent ID>/flows/<Flow ID>/versions/<Version ID>``.
                  This corresponds to the ``name`` field
                  on the ``request`` instance; if ``request`` is provided, this
                  should not be set.
  
              retry (google.api_core.retry.Retry): Designation of what errors, if any,
                  should be retried.
              timeout (float): The timeout for this request.
              metadata (Sequence[Tuple[str, str]]): Strings which should be
                  sent along with the request as metadata.
  
          Returns:
              ~.operation.Operation:
                  An object representing a long-running operation.
  
                  The result type for the operation will be
                  :class:``~.empty.Empty``: A generic empty message that
                  you can re-use to avoid defining duplicated empty
                  messages in your APIs. A typical example is to use it as
                  the request or the response type of an API method. For
                  instance:
  
                  ::
  
                      service Foo {
                        rpc Bar(google.protobuf.Empty) returns (google.protobuf.Empty);
                      }
  
                  The JSON representation for ``Empty`` is empty JSON
                  object ``{}``.
  
          """
          # Create or coerce a protobuf request object.
          # Sanity check: If we got a request object, we should *not* have
          # gotten any keyword arguments that map to the request.
          has_flattened_params = any([name])
          if request is not None and has_flattened_params:
              raise ValueError(
                  "If the `request` argument is set, then none of "
                  "the individual field arguments should be set."
              )
  
          # Minor optimization to avoid making a copy if the user passes
          # in a version.LoadVersionRequest.
          # There's no risk of modifying the input as we've already verified
          # there are no flattened fields.
          if not isinstance(request, version.LoadVersionRequest):
              request = version.LoadVersionRequest(request)
  
              # If we have keyword arguments corresponding to fields on the
              # request, apply these.
  
              if name is not None:
                  request.name = name
  
          # Wrap the RPC method; this adds retry and timeout information,
          # and friendly error handling.
          rpc = self._transport._wrapped_methods[self._transport.load_version]
  
          # Certain fields should be provided within the metadata header;
          # add these here.
          metadata = tuple(metadata) + (
              gapic_v1.routing_header.to_grpc_metadata((("name", request.name),)),
          )
  
          # Send the request.
          response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)
  
          # Wrap the response in an operation future.
          response = operation.from_gapic(
              response,
              self._transport.operations_client,
              empty.Empty,
              metadata_type=struct.Struct,
          )
  
          # Done; return the response.
          return response
  
  
  try:
      DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
          gapic_version=pkg_resources.get_distribution(
              "google-cloud-dialogflowcx",
          ).version,
      )
  except pkg_resources.DistributionNotFound:
      DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
  
  
  __all__ = ("VersionsClient",)
  