public ArrayRun Append(int elementCount)
{
var lastArrayCharacterIndex = FormatString.LastIndexOf(ArrayEnd);
var newFormat = FormatString.Substring(0, lastArrayCharacterIndex + 1);
if (newFormat != FormatString)
{
newFormat += ElementCount + elementCount;
}
return(new ArrayRun(owner, newFormat, LengthFromAnchor, Start, ElementCount + elementCount, ElementContent, PointerSources, PointerSourcesForInnerElements));
}
