}
public String removeVersion() {
FolderDao folderDao = FolderDao.createInstance();
CustomTreeNode ctn = (CustomTreeNode) this.versionsTreeModel.getNode();
folderDao.removeVersion((Folder) ctn.getContent());
Folder folder = folderDao.retrieve(this.selectedFolder.getId());
this.selectedFolder = new ViewFolder(folder);
this.metadataTreeModel = getMetadataTreeNode();
this.versionsTreeModel = getVersionsTreeNode();