slice
fun CharSequence.slice(indices: IntRange): CharSequenceReturns a char sequence containing characters of the original char sequence at the specified range of indices.
fun String.slice(indices: IntRange): StringReturns a string containing characters of the original string at the specified range of indices.
fun CharSequence.slice(indices: Iterable<Int>): CharSequenceReturns a char sequence containing characters of the original char sequence at specified indices.