code: def __contains__(self, name):
      return name in self.__dict__
  
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 4 for calling the Event obj's underlying member method code with example usage: obj.__contains__(name) and returns: unknown