text: # coding=utf-8
  # --------------------------------------------------------------------------
  # Copyright (c) Microsoft Corporation. All rights reserved.
  # Licensed under the MIT License. See License.txt in the project root for license information.
  # Code generated by Microsoft (R) AutoRest Code Generator.
  # Changes may cause incorrect behavior and will be lost if the code is regenerated.
  # --------------------------------------------------------------------------
  from typing import Any, Callable, Dict, Generic, List, Optional, TypeVar
  import warnings
  
  from azure.core.exceptions import ClientAuthenticationError, HttpResponseError, ResourceExistsError, ResourceNotFoundError, map_error
  from azure.core.pipeline import PipelineResponse
  from azure.core.pipeline.transport import AsyncHttpResponse, HttpRequest
  
  from ... import models
  
  T = TypeVar('T')
  ClsType = Optional[Callable[[PipelineResponse[HttpRequest, AsyncHttpResponse], T, Dict[str, Any]], Any]]
  
  class userscontactfolderscontactsOperations:
      """userscontactfolderscontactsOperations async operations.
  
      You should not instantiate this class directly. Instead, you should create a Client instance that
      instantiates it for you and attaches it as an attribute.
  
      :ivar models: Alias to model classes used in this operation group.
      :type models: ~users_functions.models
      :param client: Client for service requests.
      :param config: Configuration of service client.
      :param serializer: An object model serializer.
      :param deserializer: An object model deserializer.
      """
  
      models = models
  
      def __init__(self, client, config, serializer, deserializer) -> None:
          self._client = client
          self._serialize = serializer
          self._deserialize = deserializer
          self._config = config
  
      async def delta(
          self,
          user_id: str,
          contact_folder_id: str,
          **kwargs
      ) -> List["models.microsoftgraphcontact"]:
          """Invoke function delta.
  
          Invoke function delta.
  
          :param user_id: key: id of user.
          :type user_id: str
          :param contact_folder_id: key: id of contactFolder.
          :type contact_folder_id: str
          :keyword callable cls: A custom type or function that will be passed the direct response
          :return: list of microsoftgraphcontact, or the result of cls(response)
          :rtype: list[~users_functions.models.microsoftgraphcontact]
          :raises: ~azure.core.exceptions.HttpResponseError
          """
          cls = kwargs.pop('cls', None)  # type: ClsType[List["models.microsoftgraphcontact"]]
          error_map = {
              401: ClientAuthenticationError, 404: ResourceNotFoundError, 409: ResourceExistsError
          }
          error_map.update(kwargs.pop('error_map', {}))
          accept = "application/json"
  
          # Construct URL
          url = self.delta.metadata['url']  # type: ignore
          path_format_arguments = {
              'user-id': self._serialize.url("user_id", user_id, 'str'),
              'contactFolder-id': self._serialize.url("contact_folder_id", contact_folder_id, 'str'),
          }
          url = self._client.format_url(url, **path_format_arguments)
  
          # Construct parameters
          query_parameters = {}  # type: Dict[str, Any]
  
          # Construct headers
          header_parameters = {}  # type: Dict[str, Any]
          header_parameters['Accept'] = self._serialize.header("accept", accept, 'str')
  
          request = self._client.get(url, query_parameters, header_parameters)
          pipeline_response = await self._client._pipeline.run(request, stream=False, **kwargs)
          response = pipeline_response.http_response
  
          if response.status_code not in [200]:
              map_error(status_code=response.status_code, response=response, error_map=error_map)
              error = self._deserialize(models.odataerror, response)
              raise HttpResponseError(response=response, model=error)
  
          deserialized = self._deserialize('[microsoftgraphcontact]', pipeline_response)
  
          if cls:
              return cls(pipeline_response, deserialized, {})
  
          return deserialized
      delta.metadata = {'url': '/users/{user-id}/contactFolders/{contactFolder-id}/contacts/microsoft.graph.delta()'}  # type: ignore
  