code: def convert_layer(layer):
      """
      If layer instance is callable (meaning this is already a concrete TF class), return layer, otherwise convert to TF type
      :param layer: layer to be converted
      :return: converted layer if not callable, otherwise layer itself
      """
      if callable(layer):
          return layer
      return tf_layer_dict[type(layer)](layer)
  
imports: import math
  from types import FunctionType
  import tensorflow
  from rl_coach.architectures import layers
  from rl_coach.architectures.tensorflow_components import utils
label_desc: Use image node_id 4 for calling a global function with example usage: convert_layer(layer) and returns: tf_layer_dict, layer