method that simulates the way interfaces work in Java made in Javascript
this is just a test for how interfaces can be accomplished using Javascript in order to use it
_implements(ClassName, InterfaceArray);
this InterfaceArray can contain either strings that represent method names
['calculateArea', 'getWidth']
or we could use objects that have the name of the method and argumentList if you want the contracted method
to have a specific arguementList
['calculateArea', {name: 'setRadius', args: ['raduis']}]
the way the argument list is checked it's not fully implemented also there isn't any type checking so it's just a basic implementation/ test for how to accomplish interfaces in JavaScript