code: def assertMatch(self, target_str, pattern_str):
      node = parser.parse_expression(target_str)
      pattern = parser.parse_expression(pattern_str)
      self.assertTrue(ast_util.matches(node, pattern))
  
imports: import ast
  import collections
  import textwrap
  import unittest
  import gast
  from nvidia.dali._autograph.pyct import anno
  from nvidia.dali._autograph.pyct import ast_util
  from nvidia.dali._autograph.pyct import loader
  from nvidia.dali._autograph.pyct import parser
  from nvidia.dali._autograph.pyct import pretty_printer
  from nvidia.dali._autograph.pyct import qual_names
label_desc: Use image node_id 12 for calling the AstUtilTest obj's underlying member method code with example usage: obj.assertMatch(target_str, pattern_str) without return types