code: def _ReluGrad(op: ops.Operation, grad):
      return gen_nn_ops.relu_grad(grad, op.outputs[0])
  
imports: import functools
  import itertools
  import operator
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import array_ops_stack
  from tensorflow.python.ops import gen_nn_ops
  from tensorflow.python.ops import math_ops
label_desc: Use image node_id 18 for calling a global function with example usage: _ReluGrad(op, grad) and returns: gen_nn_ops