code: def testIsCopyNode(self):
      self.assertTrue(
          debug_graphs.is_copy_node("__copy_ns1/ns2/node3_0")
      )
  
      self.assertFalse(
          debug_graphs.is_copy_node("copy_ns1/ns2/node3_0")
      )
      self.assertFalse(
          debug_graphs.is_copy_node("_copy_ns1/ns2/node3_0")
      )
      self.assertFalse(
          debug_graphs.is_copy_node("_copyns1/ns2/node3_0")
      )
      self.assertFalse(
          debug_graphs.is_copy_node("__dbg_ns1/ns2/node3_0")
      )
  
imports: from tensorflow.python.debug.lib import debug_graphs
  from tensorflow.python.framework import test_util
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the NodeNameChecksTest obj's underlying member method code with example usage: obj.testIsCopyNode() without return types