code: def sink_create(
          self, project, sink_name, filter_, destination, unique_writer_identity=False
      ):
          
          parent = "projects/%s" % (project,)
          sink_pb = LogSink(name=sink_name, filter=filter_, destination=destination)
          created_pb = self._gapic_api.create_sink(
              parent, sink_pb, unique_writer_identity=unique_writer_identity
          )
          return MessageToDict(created_pb)
docs: API call:  create a sink resource.
  
          See
          https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.sinks/create
  
          :type project: str
          :param project: ID of the project in which to create the sink.
  
          :type sink_name: str
          :param sink_name: the name of the sink
  
          :type filter_: str
          :param filter_: the advanced logs filter expression defining the
                          entries exported by the sink.
  
          :type destination: str
          :param destination: destination URI for the entries exported by
                              the sink.
  
          :type unique_writer_identity: bool
          :param unique_writer_identity: (Optional) determines the kind of
                                         IAM identity returned as
                                         writer_identity in the new sink.
  
          :rtype: dict
          :returns: The sink resource returned from the API (converted from a
                    protobuf to a dictionary).