GLOBAL SCOPE:
    (1,1) -> class A
    (7,1) -> class B : A
    (14,1) -> class Main
    CLASS SCOPE OF 'A':
        (2,6) -> function f : class : A->int
        FORMAL SCOPE OF 'f':
            (2,6) -> variable @this : class : A
            LOCAL SCOPE:
    CLASS SCOPE OF 'B':
        (8,6) -> function g : class : B->int
        FORMAL SCOPE OF 'g':
            (8,6) -> variable @this : class : B
            LOCAL SCOPE:
    CLASS SCOPE OF 'Main':
        (15,17) -> static function main : void
        FORMAL SCOPE OF 'main':
            LOCAL SCOPE:
                (16,10) -> variable a : int