(Program
  (Module
    (Identifier))
  (Function
    (Identifier)
    (Args))
  (Function
  { (Identifier)
  ->(Identifier) }
    (Args
      (ParameterDecl
        (PointerTy
          (Identifier))
        (Identifier))))
  (Function
  { (Identifier)
  ->(Identifier) }
    (Args
      (ParameterDecl
        (Identifier))))
  (Function
  { (Identifier)
  ->(Identifier) }
    (Args
      (Identifier)
      (ParameterDecl
        (Identifier)))))