Feature request: settings map identical?

Nobody has claimed this yet.

Either provide a function to tell whether two settings maps are identical, or guarantee that the integer handles are equal whenever the maps are identical.

I don't expect this "identical" operation to be used for implementing the `Eq` trait `==` on the auto-splitter side. My intended use case would be to allow a `load_if_changed` function on the auto-splitter side.

For example:
I load the settings map and call it `A`, and then load it again on a future tick and call it `B`.
If the settings map has been unchanged for that time, then either `A` and `B` should be different handle integers but which "identical" returns true for, or they should be guaranteed to be the same handle integer, in which case there would be no need for a special "identical" function.

No file or test is named in the issue. Start by locating the settings-map and auto-splitter APIs, then determine whether unchanged maps should be recognized by an identical operation or by stable handle integers; done means one of these behaviors is specified and verified.

Written by the indexing model from the issue text.