code: def schema(self) -> pa.Schema:
      return self._schema
  
file_path: vegafusion/python/vegafusion/vegafusion/datasource/pandas_datasource.py
imports: from typing import Iterable
  from math import floor
  import pandas
  import pyarrow
  from .datasource import Datasource
label_desc: Use image node_id 2 for calling the PandasDatasource obj's underlying member method code with example usage: obj.schema() and returns: self