without this it can be misunderstood that execute() can be used with Strings with this we're informing the users that the value of the given property (url, header, body) has to be uniquely a execute command fixes #231
without this it can be misunderstood that execute() can be used with Strings with this we're informing the users that the value of the given property (url, header, body) has to be uniquely a execute command fixes #231