public override void CopyTo(
int sourceIndex,
char[] destination,
int destinationIndex,
int count
)
{
var span = GetCompositeSpan(sourceIndex, count);
UnderlyingText.CopyTo(span.Start, destination, destinationIndex, span.Length);
}
public override string ToString(TextSpan span)
{
CheckSubSpan(span);
return(UnderlyingText.ToString(GetCompositeSpan(span.Start, span.Length)));
}