fun insert(index: Int, c: Char): StringBuilder

fun insert(index: Int, csq: CharSequence?): StringBuilder

fun insert(
    index: Int, 
    csq: CharSequence?, 
    start: Int, 
    end: Int
): StringBuilder

fun insert(index: Int, chars: CharArray): StringBuilder

fun insert(index: Int, string: String): StringBuilder

fun insert(index: Int, value: Boolean): StringBuilder

fun insert(index: Int, value: Byte): StringBuilder

fun insert(index: Int, value: Short): StringBuilder

fun insert(index: Int, value: Int): StringBuilder

fun insert(index: Int, value: Long): StringBuilder

fun insert(index: Int, value: Float): StringBuilder

fun insert(index: Int, value: Double): StringBuilder

fun insert(index: Int, value: Any?): StringBuilder