{+(Program
  (AnonymousFunction)
  (AnonymousFunction
    (Identifier))
  (AnonymousFunction
    (Identifier)
    (KeywordParameter
      (Identifier)
      (Boolean))
    (OptionalParameter
      (Identifier)
      (Identifier))
    (IntegerLiteral))
  (AnonymousFunction)
  (AnonymousFunction
    (Identifier))
  (AnonymousFunction
    (Identifier)
    (IntegerLiteral))
  (AnonymousFunction
    (Params
      (Identifier)
      (SplatParameter
        (Identifier))
      (Other "destructured_parameter"
        (Identifier)
        (Identifier)))))+}