func golang.org/x/text/internal/language.getRegionID

3 uses

	golang.org/x/text/internal/language (current package)
		language.go#L525: 	return getRegionID(buf[:copy(buf[:], s)])
		lookup.go#L200: func getRegionID(s []byte) (Region, error) {
		parse.go#L332: 		t.RegionID, e = getRegionID(scan.token)