(Program
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    (Identifier))
  (Function
    (Empty)
    (Identifier)
    (Statements)
    (Statements))
  (Function
    (Empty)
  { (Identifier)
  ->(Identifier) }
    (Variadic
      (Pointer
        (Identifier))
      (Identifier))
    (Statements))
  (Function
    (Empty)
  { (Identifier)
  ->(Identifier) }
    (Variadic
      (Identifier)
      (Empty))
    (Statements))
  (Function
    (Empty)
  { (Identifier)
  ->(Identifier) }
    (Statements
      (Statements
        (Identifier))
      (Variadic
        (Identifier)
        (Empty)))
    (Statements)))