(Program
  (ExpressionStatements
    (Class
      (Identifier)
      (Assignment(Identifier)(NumberLiteral))
      (Method
        (Identifier)
        (Identifier)
        (Return
          (Identifier)))
      (Method
        (Identifier)
        (Identifier)
        (Return
          (Identifier)))
      (Method
        (Identifier)
        (Identifier)
        (Return
          (Identifier))))))