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