code: def __repr__(self) -> str:
      return "MockSupertypes2With3"
  
imports: import collections
  from tensorflow.core.function.trace_type import default_types
  from tensorflow.core.function.trace_type import serialization
  from tensorflow.python.platform import test
  from tensorflow.python.types import trace
label_desc: Use image node_id 7 for calling the MockSupertypes2With3 obj's underlying member method code with example usage: obj.__repr__() and returns: str