UserText "$block-instance-original-object-id$" for items in blockeditor

Hi there,

as far as I know any object opened in the blockeditor gets tagged with the following user text:
"$block-instance-original-object-id$" containing an Guid e.g. in my case d76e4c66-edc5-49cc-aab3-7dd72ccf96e6.

The thing I don’t understand is what source it refers to?
I was checking

  • all instance definition objects’ Ids
  • all objects’ Ids
  • all instance definitions Ids

but I did not find a match.
Maybe I missed something?

The purpose is to find out if I am in the blockedit model.

Thanks,
T.

I think this refers also to this one from @dave_stasiuk!