protected override void AddAdditionalMenuItems(SelectedItemCollection selection)
{
if (selection.ToList().All(item => !Helpers.CrossPoolMigrationRestrictedWithWlb(item.Connection)))
{
VMOperationCommand cmd = new CrossPoolMigrateCommand(Command.MainWindowCommandInterface, selection);
DropDownItems.Add(new ToolStripSeparator());
VMOperationToolStripMenuSubItem lastItem = new VMOperationToolStripMenuSubItem(cmd);
DropDownItems.Add(lastItem);
}
}