def get_index(self, index_id: str) -> MatchingEngineIndex:
        """
        Retrieves a MatchingEngineIndex (VectorSearchIndex) by id.

        Args:
            index_id: Id of the index to be retrieved.

        Returns:
            MatchingEngineIndex instance.

        """
        _, user_agent = get_user_agent("llama-index-vector-stores-vertexaivectorsearch")
        with telemetry.tool_context_manager(user_agent):
            return MatchingEngineIndex(
                index_name=index_id,
                project=self._project_id,
                location=self._region,
                credentials=self._credentials,
            )

        Retrieves a MatchingEngineIndex (VectorSearchIndex) by id.

        Args:
            index_id: Id of the index to be retrieved.

        Returns:
            MatchingEngineIndex instance.

        
llama-index-integrations/vector_stores/llama-index-vector-stores-vertexaivectorsearch/llama_index/vector_stores/vertexaivectorsearch/_sdk_manager.py