var unique.uniqueMaps

3 uses

	unique (current package)
		handle.go#L39: 	ma, ok := uniqueMaps.Load(typ)
		handle.go#L42: 		ma, _ = uniqueMaps.LoadOrStore(typ, m)
		handle.go#L64: var uniqueMaps isync.HashTrieMap[*abi.Type, any] // any is always a *uniqueMap[T].