All but one of these are definitely trivial, obvious, and in the context
of the project and ecosystem not creative works (⅌ copyright doctrine
definition); or else no longer present. The one arguable exception is 2e37f0d1aebbd0c56acd0de7b46d14cd71d3e134, adding AnyMap::contains, since
I hadn’t added a contains method; but its *definition* is trivial with
only one possible implementation, and subsequent to that time I did go
through and check for parity with HashMap methods, to say nothing of the
code having changed shape quite a bit since then too. Therefore I’m
content to consider it immaterial for relicensing.