REGISTER_OP("MyAddN")
    .Input("inputs: N * T")
    .Output("sum: T")
    .Attr("N: int >= 1")
    .Attr("T: {numbertype, variant}")
    .SetIsCommutative()
    .SetIsAggregate();

REGISTER_OP("MyBiasedDense")
    .Input("input: T")
    .Input("weight: T")
    .Input("bias: T")
    .Output("out: T")
    .Attr("T: {float, int8}")
    .Attr("act: {'', 'relu', 'relu6'} = ''");