Is there any way to create gemini valid vega spec with two axes?

[giorgi-ghviniashvili]

I created a fake faceted view which just uses x-axis facet titles.
Sometimes we need to handle two x-axis, one for facet titles and one for real x-axis. I can achieve this with layer, but then layer is also not supported.

Can you suggest workaround for this?

[yhoonkim]

Sadly, Gemini cannot support 2+ x/y-axes now. Though, supporting the multiple axes may need more time for me.