code: def __contains__(self, item):
      warnings.warn(
          "Evaluating inclusion in security_lists is deprecated. Use "
          "`sid in <security_list>.current_securities(dt)` instead.",
          category=ZiplineDeprecationWarning,
          stacklevel=2,
      )
      return item in self.current_securities(self.current_date())
  
imports: import warnings
  from datetime import datetime
  from os import listdir
  import os.path
  import pandas
  import pytz
  import catalyst
  from catalyst.errors import SymbolNotFound
  from catalyst.finance.asset_restrictions import SecurityListRestrictions
  from catalyst.catalyst_warnings import ZiplineDeprecationWarning
label_desc: Use image node_id 4 for calling the SecurityList obj's underlying member method code with example usage: obj.__contains__(item) and returns: unknown