(Program
  (Module
    (Identifier))
  (Function
    (Identifier)
    (Args)
    (Other "const_declaration"
      (VarAssignment
        (Identifier)
        (Other "expression_list"
          (AnonymousFunction
          { (Identifier)
          ->(Identifier) }
          { (Identifier)
          ->(Identifier) }
            (Return
              (Other "expression_list"
                (NumberLiteral)
                (NumberLiteral)))))))))