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

3 uses

	golang.org/x/text/internal/language (current package)
		language.go#L501: 	return getRegionID(buf[:copy(buf[:], s)])
		lookup.go#L200: func getRegionID(s []byte) (Region, error) {
		parse.go#L320: 		t.RegionID, e = getRegionID(scan.token)

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