class_docstr: Represents a parameter to a function.
docstr: A supertype that the parameter's type must subtype for validity.
docstr_tok: ["A","supertype","that","the","parameter","'s","type","must","subtype","for","validity","."]
code: def type_constraint(self) -> Optional[trace.TraceType]:
      """A supertype that the parameter's type must subtype for validity."""
      return (
          self.annotation if self.annotation is not self.empty else None
      )
  
imports: import collections
  import inspect
  from typing import Any, Callable, Dict, List, Mapping, Optional, Sequence, Tuple
  from absl import logging
  from tensorflow.core.function import trace_type
  from tensorflow.core.function.polymorphism import function_type_pb2
  from tensorflow.core.function.trace_type import serialization
  from tensorflow.python.types import core
  from tensorflow.python.types import trace
label_desc: Use image node_id 5 for calling the Parameter obj's underlying member method code with example usage: obj.type_constraint() and returns: unknown