code: def test_dedent_block_multiline_string(self):
      code = """
      def f():
        '''
        Docstring.
        '''
        return '''
    1
      2
        3'''
      """
  
      f = self._eval_code(parser.dedent_block(code), "f")
      self.assertEqual(f.__doc__, "\n      Docstring.\n      ")
      self.assertEqual(f(), "\n  1\n    2\n      3")
  
imports: import re
  import textwrap
  import gast
  from tensorflow.python.autograph.pyct import ast_util
  from tensorflow.python.autograph.pyct import errors
  from tensorflow.python.autograph.pyct import parser
  from tensorflow.python.autograph.pyct import pretty_printer
  from tensorflow.python.platform import test
label_desc: Use image node_id 19 for calling the ParserTest obj's underlying member method code with example usage: obj.test_dedent_block_multiline_string() without return types