code: def is_copy_node(node_name):
      """Determine whether a node name is that of a debug Copy node.
  
      Such nodes are inserted by TensorFlow core upon request in
      RunOptions.debug_options.debug_tensor_watch_opts.
  
      Args:
        node_name: Name of the node.
  
      Returns:
        A bool indicating whether the input argument is the name of a debug Copy
        node.
      """
      return node_name.startswith("__copy_")
  
imports: from tensorflow.core.framework import graph_pb2
  from tensorflow.python.framework import op_def_registry
  from tensorflow.python.platform import tf_logging
label_desc: Use image node_id 4 for calling a global function with example usage: is_copy_node(node_name) and returns: node_name