code: def is_builtin_layer(layer):
      if not getattr(layer, "_keras_api_names", None):
          return False
  
      # Subclasses of `Layer` that are not exported inherit the export name
      # of the base layer class.
      return layer._keras_api_names != (
          "keras.layers.Layer",
      ) and layer._keras_api_names_v1 != ("keras.layers.Layer",)
  
file_path: tensorflow/tensorflow/python/keras/utils/layer_utils.py
imports: import functools
  import weakref
  import numpy
  from tensorflow.python.util import nest
label_desc: Use image node_id 6 for calling a global function with example usage: is_builtin_layer(layer) and returns: unknown, False