Is it possible to have AppDataRef's lifetime non-static?

[HughHoyland]

After migrating from an earlier rlua, I discovered this amazing feature - that I can store data, even references (!!!) in Lua object.

But set_app_data only takes values with 'static lifetimes.

I hoped I can store a reference that outlives Lua object itself. Is it, in theory, possible? I could create a fork where Lua has a lifetime parameter, Lua<'lua> - any reasons it's a bad idea?

[khvzak]

Only 'static types has TypeId. The easiest option would be casting type to static through transmute (unsafe)