Configure more than 8 axes?

I do have one plot with 15 sub-plots.

I would like all of them to "match" the first one.

Layout::new()
            .x_axis2(Axis::new().matches(true))
            .x_axis3(Axis::new().matches(true))
            .x_axis4(Axis::new().matches(true))
            .x_axis5(Axis::new().matches(true))
            .x_axis6(Axis::new().matches(true))
            .x_axis7(Axis::new().matches(true))
            .x_axis8(Axis::new().matches(true))

How can I configure the remaining ones?
e.g. There is no .x_axis9(...) or .x_axis10(...) setter.
Is there a more generic way to do it for an arbitrary axes count?