code: def test_oas_20_valid(self):
      assert schemas.validate(
          {
              "swagger": "2.0",
              "info": {
                  "title": "An empty minimal specification",
                  "version": "1.0",
              },
              "paths": {},
          }
      )
  
file_path: flask-restplus/tests/test_schemas.py
imports: from __future__ import unicode_literals, absolute_import
  import pytest
  from jsonschema import ValidationError
  from flask_restplus import errors, schemas
label_desc: Use image node_id 1 for calling the ValidationTest obj's underlying member method code with example usage: obj.test_oas_20_valid() without return types