code: def is_subtype_of(self, other):
      return other._object == 2
  
imports: import dataclasses
  from typing import Any
  from tensorflow.core.function.trace_type import custom_nest_trace_type
  from tensorflow.core.function.trace_type import default_types
  from tensorflow.python.platform import test
  from tensorflow.python.types import trace
label_desc: Use image node_id 1 for calling the Mock2AsTopType obj's underlying member method code with example usage: obj.is_subtype_of(other) and returns: unknown