@Nullable
    @Override
    public ITabbedFolder getActiveFolder()
    {
        if (getActiveEditor() instanceof ITabbedFolderContainer) {
            ((ITabbedFolderContainer)getActiveEditor()).getActiveFolder();
        }
        return null;
    }
Saves data in all nested editors
@param monitor progress monitor
plugins/org.jkiss.dbeaver.ui.navigator/src/org/jkiss/dbeaver/ui/editors/entity/EntityEditor.java