class_docstr: Container for variables and flags shared across TraceType generation.
code: def add_placeholder(self, alias_id: Hashable, variable) -> None:
      self._alias_id_to_placeholder[alias_id] = variable
  
imports: import collections.abc
  from typing import Any, Dict, Hashable, Optional
  import weakref
  from tensorflow.core.function.trace_type import custom_nest_trace_type
  from tensorflow.core.function.trace_type import default_types
  from tensorflow.core.function.trace_type import util
  from tensorflow.python.types import trace
  from tensorflow.python.util import custom_nest_protocol
label_desc: Use image node_id 3 for calling the InternalTracingContext obj's underlying member method code with example usage: obj.add_placeholder(alias_id, variable) without return types