code: def grpc_query(self):
      if self._grpc_channel is None:
          raise ValueError(
              "No grpc channel registered. Use runtime.grpc_connect to provide a grpc channel"
          )
  
      if self._grpc_query is None:
          self._grpc_query = self._grpc_channel.unary_unary(
              "/services.VegaFusionRuntime/TaskGraphQuery",
          )
      return self._grpc_query
  
imports: import pandas
  import psutil
  import pyarrow
  from typing import Union
  from .connection import SqlConnection
  from .dataset import SqlDataset, DataFrameDataset
  from .datasource import PandasDatasource, DfiDatasource
  from .evaluation import get_mark_group_for_scope
  from .transformer import import_pyarrow_interchange, to_arrow_table
  from .local_tz import get_local_tz
  from typing import TypedDict, List, Literal, Any
label_desc: Use image node_id 6 for calling the VegaFusionRuntime obj's underlying member method code with example usage: obj.grpc_query() and returns: self