public override void Execute()
{
if (mDups == null)
{
mDups = UserUtil.Duplicate(mNodes, mRoot);
}
for (var i = 0; i < mDups.Length; i++)
{
mDups[i].MarkInternalDisposed(false);
mDups[i].SetParent(mParents[i]);
}
mSelection = UserDatabase.selection.nodes;
UserDatabase.selection.nodes = mDups;
}