anchor.diff:         , description => <<"Production time">>
          , example => <<"1995">>
          }
  -   }.+   }.
  +
  +%% @private
  +set_swagger_version(swagger_2_0) ->
  +  Spec0 = maps:remove(openapi, application:get_env(cowboy_swagger, global_spec, #{})),
  +  application:set_env(cowboy_swagger, global_spec, Spec0#{swagger => "2.0"});
  +set_swagger_version(openapi_3_0_0) ->
  +  Spec0 = maps:remove(swagger, application:get_env(cowboy_swagger, global_spec, #{})),
  +  application:set_env(cowboy_swagger, global_spec, Spec0#{openapi => "3.0.0"}).
positive.code: -spec add_definition_test(Config::cowboy_swagger_test_utils:config()) ->
    {comment, string()}.
  add_definition_test(_Config) ->
    %%
    %% Given
    %%
  
negative.code:    trails:trail("/a", handler3, [], Metadata1)|
     cowboy_swagger_handler:trails()].
  
  %% @private
  test_properties_one() ->
    #{ <<"first_name">> =>
        #{ type => <<"string">>
  