DO NOT MERGE

it has same problem iterator<ptr(uint64)> stable error.

I don't think we need to stabilize this one as the API is exposed via collection view.

hmmm could be.
anyway we have change to make it public after released, so okay I agreed.

still it is necessary to make test case between VM and M without View at the end.

and for the notice,
me and @bu5hm4n agreed to keep multi_selectable and multi_selectable in beta,
while the selectable and single_selectale is stabilized.

are you okay with this?

Yes

@cedric can we either move this here out of review queue or dicsuss what the plan of it is ?