code: def test_operatordef_simple(self):
      nn = ng.NNModule()
      dfg = nn.dataFlow
      op = core.CreateOperator("Ceil", ["X"], ["Y"], engine="CUDNN")
      dfg.createNode(op)
      for node in dfg.getMutableNodes():
          assert node.isOperator()
          assert node.getOperator().getName() == "Ceil"
  
imports: from caffe2.python import core, test_util
  from caffe2.proto import caffe2_pb2
  import caffe2.python.nomnigraph
  from hypothesis import given
  import hypothesis.strategies
  import random
label_desc: Use image node_id 6 for calling the TestBindings obj's underlying member method code with example usage: obj.test_operatordef_simple() without return types