code: def testParseDebugNodeName_valid(self):
      debug_node_name_1 = "__dbg_ns_a/ns_b/node_c:1_0_DebugIdentity"
      (
          watched_node,
          watched_output_slot,
          debug_op_index,
          debug_op,
      ) = debug_graphs.parse_debug_node_name(debug_node_name_1)
  
      self.assertEqual("ns_a/ns_b/node_c", watched_node)
      self.assertEqual(1, watched_output_slot)
      self.assertEqual(0, debug_op_index)
      self.assertEqual("DebugIdentity", debug_op)
  
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 ParseDebugNodeNameTest obj's underlying member method code with example usage: obj.testParseDebugNodeName_valid() without return types