code: def to_series(self, index=None):
      return pd.Series(self.__dict__, index=index)
  
imports: from warnings import warn
  import pandas
  from catalyst.assets import Asset, Future
  from catalyst.utils.input_validation import expect_types
  from .utils.enum import enum
  from catalyst._protocol import BarData
label_desc: Use image node_id 6 for calling the Event obj's underlying member method code with example usage: obj.to_series(index) and returns: pd