func path/filepath.Ext

3 uses

	path/filepath (current package)
		path.go#L220: func Ext(path string) string {

	net/http
		fs.go#L235: 		ctype = mime.TypeByExtension(filepath.Ext(name))

	src.elv.sh/pkg/eval/mods/path
		path.go#L21: 	"ext":           filepath.Ext,