code: def sid(self):
      # For backwards compatibility because we pass this object to
      # custom slippage models.
      return self.asset
  
imports: import math
  import uuid
  from six import text_type
  import zipline.protocol
  from zipline.assets import Asset
  from zipline.utils.enum import enum
  from zipline.utils.input_validation import expect_types
label_desc: Use image node_id 4 for calling the Order obj's underlying member method code with example usage: obj.sid() and returns: self