code: def test_google_format_args_only(self):
      docstring = """One line description.
  
      Args:
        arg1: arg1_description
        arg2: arg2_description
      """
      docstring_info = docstrings.parse(docstring)
      expected_docstring_info = DocstringInfo(
          summary="One line description.",
          args=[
              ArgInfo(name="arg1", description="arg1_description"),
              ArgInfo(name="arg2", description="arg2_description"),
          ],
      )
      self.assertEqual(expected_docstring_info, docstring_info)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from fire import docstrings
  from fire import testutils
label_desc: Use image node_id 6 for calling the DocstringsTest obj's underlying member method code with example usage: obj.test_google_format_args_only() without return types