var unique.uniqueMaps

3 uses

	unique (current package)
		handle.go#L35: 	ma, ok := uniqueMaps.Load(typ)
		handle.go#L94: 	uniqueMaps = concurrent.NewHashTrieMap[*abi.Type, any]() // any is always a *uniqueMap[T].
		handle.go#L123: 	a, loaded := uniqueMaps.LoadOrStore(typ, m)