async def delete_session_entity_type(
        self,
        request: session_entity_type.DeleteSessionEntityTypeRequest = None,
        *,
        name: str = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> None:
        r"""Deletes the specified session entity type.

        Args:
            request (:class:`~.session_entity_type.DeleteSessionEntityTypeRequest`):
                The request object. The request message for
                [SessionEntityTypes.DeleteSessionEntityType][google.cloud.dialogflow.cx.v3beta1.SessionEntityTypes.DeleteSessionEntityType].
            name (:class:`str`):
                Required. The name of the session entity type to delete.
                Format:
                ``projects/<Project ID>/locations/<Location ID>/agents/<Agent ID>/sessions/<Session ID>/entityTypes/<Entity Type ID>``
                or
                ``projects/<Project ID>/locations/<Location ID>/agents/<Agent ID>/environments/<Environment ID>/sessions/<Session ID>/entityTypes/<Entity Type ID>``.
                If ``Environment ID`` is not specified, we assume
                default 'draft' environment.
                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.
        if request is not None and any([name]):
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        request = session_entity_type.DeleteSessionEntityTypeRequest(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 = gapic_v1.method_async.wrap_method(
            self._client._transport.delete_session_entity_type,
            default_timeout=None,
            client_info=DEFAULT_CLIENT_INFO,
        )

        # 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.
        await rpc(
            request, retry=retry, timeout=timeout, metadata=metadata,
        )
    def delete_session_entity_type(
            self,
            request: session_entity_type.DeleteSessionEntityTypeRequest = None,
            *,
            name: str = None,
            retry: retries.Retry = gapic_v1.method.DEFAULT,
            timeout: float = None,
            metadata: Sequence[Tuple[str, str]] = (),
    ) -> None:
        r"""Deletes the specified session entity type.

        Args:
            request (google.cloud.dialogflowcx_v3beta1.types.DeleteSessionEntityTypeRequest):
                The request object. The request message for
                [SessionEntityTypes.DeleteSessionEntityType][google.cloud.dialogflow.cx.v3beta1.SessionEntityTypes.DeleteSessionEntityType].
            name (str):
                Required. The name of the session entity type to delete.
                Format:
                ``projects/<Project ID>/locations/<Location ID>/agents/<Agent ID>/sessions/<Session ID>/entityTypes/<Entity Type ID>``
                or
                ``projects/<Project ID>/locations/<Location ID>/agents/<Agent ID>/environments/<Environment ID>/sessions/<Session ID>/entityTypes/<Entity Type ID>``.
                If ``Environment ID`` is not specified, we assume
                default 'draft' environment.

                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 session_entity_type.DeleteSessionEntityTypeRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(request,
                          session_entity_type.DeleteSessionEntityTypeRequest):
            request = session_entity_type.DeleteSessionEntityTypeRequest(
                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_session_entity_type]

        # 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,
        )