(Program
  (Function
    (Empty)
    (Empty)
    (Identifier)
    (RequiredParameter
      (Empty)
      (Empty)
      (Empty)
      (Assignment
        (Identifier)
        (Empty)))
    (RequiredParameter
      (Empty)
      (Empty)
      (Empty)
      (Assignment
        (Identifier)
        (Empty)))
    (
      (DoWhile
      { (Identifier)
      ->(Identifier) }
        (
          (Call
            (Identifier)
          { (Identifier)
          ->(Identifier) }
            (Empty)))))))