public Block Get(DocumentOwner owner)
{
if (_ids == null)
{
return(null);
}
BlockCollection collection = owner.Root;
Block block = null;
for (int i = _ids.Length - 1; i >= 0; i--)
{
int blockIndex = _ids[0];
Debug.Assert(collection != null);
block = collection.GetNthBlock(blockIndex);
collection = block as BlockCollection;
}
return(block);
}