Normalize usage of this

[sanderploegsma]

It would be nice if the representer was able to normalize code such as the following two snippets into the same representation:

class SomeClass {
    private String someField = "";

    String getSomeField() {
        return someField;
    }

    void setSomeField(String someField) {
        this.someField = someField;
    }
}

class SomeClass {
    private String someField = "";

    String getSomeField() {
        return this.someField;
    }

    void setSomeField(String someField) {
        this.someField = someField;
    }
}

Right now, these variants both get their own representation because one uses this in getSomeField() while the other one doesn't. The easiest way to normalize would be to always add this when referencing instance fields or methods, since removing it will result in invalid code for setSomeField().