(Program
  (Class
    (Identifier)
    (Annotation
      (Function
        (Identifier)
        (Identifier)
        (Return
          (Identifier)))
      (Empty)))
  (Class
    (Identifier)
    (NoOp
      (Empty)))
  (Class
    (Identifier)
    (Identifier)
    (Annotation
      (Function
        (Identifier)
        (Identifier)
        (Return
          (Empty)))
      (Empty))))