code: def _recursive_del_node(self, op):
      for inp in op.inputs:
          self._recursive_del_node(inp)
      self.decrease_refcount(op)
  
imports: import numpy
  import tensorflow.compat.v1
  from tensorflow.core.framework.tensor_pb2 import TensorProto
  from tensorflow.core.framework.tensor_shape_pb2 import TensorShapeProto
label_desc: Use image node_id 12 for calling the RefineGraph obj's underlying member method code with example usage: obj._recursive_del_node(op) without return types