code: def _identify_gradient_grad_ref(op, dy):
      """Gradient function for the DebugIdentity op."""
      return _identify_gradient_grad(op, dy)
  
imports: import re
  import uuid
  from tensorflow.python.debug.lib import debug_data
  from tensorflow.python.debug.lib import debug_graphs
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor
  from tensorflow.python.ops import gen_array_ops
  from tensorflow.python.ops import variables
label_desc: Use image node_id 5 for calling a global function with example usage: _identify_gradient_grad_ref(op, dy) and returns: _identify_gradient_grad