function test_Attribute()
    # @testset "Attribute" begin
    #     @test Attribute isa Type
    # 
    #     #TODO attr = Attribute()
    #     #TODO @test dtype(attr) <: OpenPMDType
    #     #TODO @test attr[] isa OpenPMDType
    #     #TODO @test typeof(attr[]) === dtype(attr)
    # end
end
