Subsequently, the given constructor will be used for the named methods.
The constructor will be called with no parameters.
The resulting object should usually implement getSignature(baseString).
You can easily define such a constructor by calling makeSubclass, below.
function registerMethodClass(names, classConstructor) {
        for (var n = 0; n < names.length; ++n) {
            OAuth.SignatureMethod.REGISTERED[names[n]] = classConstructor;
        }
    }