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  (Function
    (Identifier)
    (Statements
      (Identifier)))
  (Function
    (Identifier)
    (RequiredParameter
      (Identifier))
    (Statements
      (Identifier)))
  (Function
    (Identifier)
    (RequiredParameter
      (Identifier))
    (Identifier)
    (Statements
      (Identifier)))
  (Function
    (Identifier)
    (Assignment
      (Identifier)
      (Identifier))
    (Statements
      (Identifier)))
  (Function
    (Identifier)
    (Annotation
      (Assignment
        (Identifier)
        (TextElement))
      (Identifier))
    (Identifier)
    (Statements
      (Identifier))))