(Program
  (Module
    (Identifier))
  (Function
    (Empty)
    (Identifier)
    ([])
    (
      (Identifier)
      (Negate
        (Identifier))
      (Not
        (ReceiveOperator
          (Identifier)))
      (Pointer
        (Call
          (Identifier)
          ([])
          (Empty)))
      (Complement
        (Identifier))
      (Reference
        (Identifier))
      (ReceiveOperator
        (Identifier)))))