code: def _protected_memory(self):
      if self._embedded_runtime:
          return self._embedded_runtime.protected_memory()
      else:
          return None
  
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 18 for calling the VegaFusionRuntime obj's underlying member method code with example usage: obj._protected_memory() and returns: self, None