code: def _memoize_by_id(fn, refs):
      """Memoization by module/variable id to handle aliasing in traversal."""
  
      @functools.wraps(fn)
      def wrapped_fn(x):
          nonlocal refs
          if isinstance(x, (VariablePlaceholder, InstancePlaceholder)):
              x_id = x.id
          elif isinstance(x, (Variable, Module)):
              x_id = x._id
          else:
              return fn(x)
          if x_id not in refs:
              refs[x_id] = fn(x)
          return refs[x_id]
  
      return wrapped_fn
  
imports: import dataclasses
  import functools
  import inspect
  from typing import Any, Callable, Dict, Iterable, Mapping, Optional, Sequence, Tuple, Type, TypeVar, Union
  from flax import errors, struct, traceback_util
  from flax.core import Scope, lift, meta
  from flax.core.frozen_dict import FrozenDict
  from flax.linen import module
  from flax.linen.module import Module, Variable, _derive_profiling_name, _get_unbound_fn, wrap_method_once
  import jax
label_desc: Use image node_id 2 for calling a global function with example usage: _memoize_by_id(fn, refs) and returns: wrapped_fn, refs, fn