(Program
  (Module
    (Identifier))
  (Function
    (Identifier)
    (Other "var_declaration"
      (VarAssignment
        (Other "identifier_list"
          (Identifier))
        (Other "expression_list"
          (NumberLiteral)))
      (VarAssignment
        (Other "identifier_list"
          (Identifier))
        (Other "expression_list"
          (NumberLiteral))))))