method WriteString(s: string): tuple of (n: Int64, err: error)

(Int64 n, error err) WriteString(string s)

func WriteString(_ s: string) -> tuple of (Int64, error)

func WriteString(s string) tuple of (|name=n| Int64, |name=err| error)

Function WriteString(s As string) As Tuple (Of Int64, error)