def update_app_profile(
        self,
        app_profile,
        update_mask,
        ignore_warnings=None,
        retry=google.api_core.gapic_v1.method.DEFAULT,
        timeout=google.api_core.gapic_v1.method.DEFAULT,
        metadata=None,
    ):
        """
        Updates an app profile within an instance.

        Example:
            >>> from google.cloud import bigtable_admin_v2
            >>>
            >>> client = bigtable_admin_v2.BigtableInstanceAdminClient()
            >>>
            >>> # TODO: Initialize `app_profile`:
            >>> app_profile = {}
            >>>
            >>> # TODO: Initialize `update_mask`:
            >>> update_mask = {}
            >>>
            >>> response = client.update_app_profile(app_profile, update_mask)
            >>>
            >>> def callback(operation_future):
            ...     # Handle result.
            ...     result = operation_future.result()
            >>>
            >>> response.add_done_callback(callback)
            >>>
            >>> # Handle metadata.
            >>> metadata = response.metadata()

        Args:
            app_profile (Union[dict, ~google.cloud.bigtable_admin_v2.types.AppProfile]): The app profile which will (partially) replace the current value.

                If a dict is provided, it must be of the same form as the protobuf
                message :class:`~google.cloud.bigtable_admin_v2.types.AppProfile`
            update_mask (Union[dict, ~google.cloud.bigtable_admin_v2.types.FieldMask]): The subset of app profile fields which should be replaced.
                If unset, all fields will be replaced.

                If a dict is provided, it must be of the same form as the protobuf
                message :class:`~google.cloud.bigtable_admin_v2.types.FieldMask`
            ignore_warnings (bool): If true, ignore safety checks when updating the app profile.
            retry (Optional[google.api_core.retry.Retry]):  A retry object used
                to retry requests. If ``None`` is specified, requests will not
                be retried.
            timeout (Optional[float]): The amount of time, in seconds, to wait
                for the request to complete. Note that if ``retry`` is
                specified, the timeout applies to each individual attempt.
            metadata (Optional[Sequence[Tuple[str, str]]]): Additional metadata
                that is provided to the method.

        Returns:
            A :class:`~google.cloud.bigtable_admin_v2.types._OperationFuture` instance.

        Raises:
            google.api_core.exceptions.GoogleAPICallError: If the request
                    failed for any reason.
            google.api_core.exceptions.RetryError: If the request failed due
                    to a retryable error and retry attempts failed.
            ValueError: If the parameters are invalid.
        """
        # Wrap the transport method to add retry and timeout logic.
        if "update_app_profile" not in self._inner_api_calls:
            self._inner_api_calls[
                "update_app_profile"
            ] = google.api_core.gapic_v1.method.wrap_method(
                self.transport.update_app_profile,
                default_retry=self._method_configs["UpdateAppProfile"].retry,
                default_timeout=self._method_configs["UpdateAppProfile"].timeout,
                client_info=self._client_info,
            )

        request = bigtable_instance_admin_pb2.UpdateAppProfileRequest(
            app_profile=app_profile,
            update_mask=update_mask,
            ignore_warnings=ignore_warnings,
        )
        if metadata is None:
            metadata = []
        metadata = list(metadata)
        try:
            routing_header = [("app_profile.name", app_profile.name)]
        except AttributeError:
            pass
        else:
            routing_metadata = google.api_core.gapic_v1.routing_header.to_grpc_metadata(
                routing_header
            )
            metadata.append(routing_metadata)

        operation = self._inner_api_calls["update_app_profile"](
            request, retry=retry, timeout=timeout, metadata=metadata
        )
        return google.api_core.operation.from_gapic(
            operation,
            self.transport._operations_client,
            instance_pb2.AppProfile,
            metadata_type=bigtable_instance_admin_pb2.UpdateAppProfileMetadata,
        )