code: def _make_write_pb(table, columns, values):
      
      return Mutation.Write(
          table=table, columns=columns, values=_make_list_value_pbs(values)
      )
docs: Helper for :meth:`Batch.insert` et aliae.
  
      :type table: str
      :param table: Name of the table to be modified.
  
      :type columns: list of str
      :param columns: Name of the table columns to be modified.
  
      :type values: list of lists
      :param values: Values to be modified.
  
      :rtype: :class:`google.cloud.spanner_v1.proto.mutation_pb2.Mutation.Write`
      :returns: Write protobuf