design: do we want to rename Set.values to Set.elements or Set.items?

[crusso]

When refactoring from Maps to Set. .values() suddenly changes meaning from. Perhaps a different names is best.

[Kamirus]

The values name convention seems based on the array, e.g. [1,2,3].values().
It is mostly consistent that every data structure provides a values method that returns an Iter over its content (just like the array.values primitive).
I guess the only problem is with the Map structures as they have values, keys and entries. Thus the values are semantically inconsistent with other data structures.

We could start changing the 'values' name to e.g. 'iter' just like in Rust. But this should start with changing the compiler.
Any other change would create other inconsistencies (e.g. values for arrays, but elements for Set...), so IMO not worth the effort