(Program
  (Package
    (Identifier))
  (Function
    (Empty)
    (Identifier)
    (Statements)
    (Statements
      (Assignment
        (Identifier)
      { (Integer)
      ->(Integer) })
      (Assignment
        (Identifier)
      { (Integer)
      ->(Integer) })
      (Assignment
        (Identifier)
      { (Integer)
      ->(Integer) }))))