(Program
  (Package
    (Identifier))
  (Function
    (Empty)
    (Identifier)
    ([])
    (
      (Assignment
      { (Identifier)
      ->(Identifier) }
        (Identifier))
      (Assignment
      { (Identifier)
      ->(Identifier) }
        ([]))
      (Assignment
      { (Identifier)
      ->(Identifier) }
        ([])))))