func path/filepath.Split

4 uses

	path/filepath (current package)
		match.go#L264: 	dir, file := Split(pattern)
		path.go#L246: func Split(path string) (dir, file string) {

	github.com/gotd/td/telegram
		builder.go#L58: 		dir, _ := filepath.Split(sessionFile)

	net/http
		fs.go#L740: 	dir, file := filepath.Split(name)