code: def testIsDebugNode(self):
      self.assertTrue(
          debug_graphs.is_debug_node(
              "__dbg_ns1/ns2/node3:0_0_DebugIdentity"
          )
      )
  
      self.assertFalse(
          debug_graphs.is_debug_node(
              "dbg_ns1/ns2/node3:0_0_DebugIdentity"
          )
      )
      self.assertFalse(
          debug_graphs.is_debug_node(
              "_dbg_ns1/ns2/node3:0_0_DebugIdentity"
          )
      )
      self.assertFalse(
          debug_graphs.is_debug_node(
              "_dbgns1/ns2/node3:0_0_DebugIdentity"
          )
      )
      self.assertFalse(
          debug_graphs.is_debug_node("__copy_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 2 for calling the NodeNameChecksTest obj's underlying member method code with example usage: obj.testIsDebugNode() without return types