/// <summary>
/// Gets the or create border.
/// </summary>
/// <param name="index">The index.</param>
/// <param name="source">The source.</param>
/// <param name="target">The target.</param>
/// <returns></returns>
private static uint GetOrCreateBorder(uint index, Stylesheet source, Stylesheet target)
{
var child = SafeIndex <Borders, Border>(source.Borders, (int)index);
if (child == null)
{
return(0);
}
uint id = 0;
if (target.TryMatchBorder(child, out id))
{
return(id);
}
return(target.AddBorder(child));
}