Add support for abstracts with overloads

[AskingQuestions]

Currently you cannot have an abstract with multiple overloads like

class MyAbstract {
    void testMethod(string abc);
    void testMethod(int abc);
}

class MyImplement inherits MyAbstract {
    void testMethod(string abc) {}
    void testMethod(int abc) {}
}

This throws an error Invalid argument type(s) for abstract method 'testMethod' in class 'MyImplement'