(Program
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    (Identifier)
    (
      (Method
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        (Empty)
        (Empty)
        (Empty)
        (Empty)
        (Identifier)
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        (
          (Return
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        (Empty)
        (Empty)
        (Empty)
        (Empty)
        (Identifier)
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          (Return
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      (Method
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        (Empty)
        (Empty)
        (Empty)
        (Empty)
        (Identifier)
        (RequiredParameter
          (Empty)
          (Empty)
          (Empty)
          (Assignment
            (Identifier)
            (Empty)))
        (
          (Return
            (Identifier)))))))