code: def testParseDebugNodeName_invalidPrefix(self):
      invalid_debug_node_name_1 = (
          "__copy_ns_a/ns_b/node_c:1_0_DebugIdentity"
      )
  
      with self.assertRaisesRegex(ValueError, "Invalid prefix"):
          debug_graphs.parse_debug_node_name(invalid_debug_node_name_1)
  
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 ParseDebugNodeNameTest obj's underlying member method code with example usage: obj.testParseDebugNodeName_invalidPrefix() without return types