code: def reject(self, reason=""):
      self.status = ORDER_STATUS.REJECTED
      self.reason = reason
  
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 12 for calling the Order obj's underlying member method code with example usage: obj.reject(reason) without return types