writeText
fun Output.writeText(text: CharSequence, fromIndex: Int = 0, toIndex: Int = text.length, charset: Charset = Charsets.UTF_8)
fun Output.writeText(text: CharArray, fromIndex: Int = 0, toIndex: Int = text.size, charset: Charset = Charsets.UTF_8)
Writes text characters in range \[fromIndex .. toIndex) with the specified charset