if(! (node instanceof FileSystemNode)) continue;
// if selected nodes are root they will fail in servers side, no need to add
// check for performance reason ...
final FileSystemNode fsNode = (FileSystemNode) node;
final File f = fsNode.getFile();
// TODO: could not find a way to hide a node .. needed for delete ..
//hide it so user thinks it is actually deleted
//explorerNode.hide();
// inform the user about the action in progress