code: def _get_node_output_num(self, op):
      output_num = 1
      if op.node.op == "Split":
          output_num = op.node.attr["num_split"].i
      return output_num
  
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 13 for calling the RefineGraph obj's underlying member method code with example usage: obj._get_node_output_num(op) and returns: output_num