code: def environment_session_entity_type_path(cls, project, environment, user,
                                               session, entity_type):
          
          return google.api_core.path_template.expand(
              'projects/{project}/agent/environments/{environment}/users/{user}/sessions/{session}/entityTypes/{entity_type}',
              project=project,
              environment=environment,
              user=user,
              session=session,
              entity_type=entity_type,
          )
docs: Return a fully-qualified environment_session_entity_type string.