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