public synchronized void dontDeleteAtExit(FileNode node) {
        if (delete == null) {
            throw new IllegalStateException();
        }
        if (!delete.remove(node)) {
            throw new IllegalArgumentException("not registered: " + node.getAbsolute());
        }
    }
public synchronized void dontDeleteAtExit ( FileNode node ) { if ( delete == null ) { throw new IllegalStateException ( ) ; } if ( ! delete . remove ( node ) ) { throw new IllegalArgumentException ( "not registered: " + node . getAbsolute ( ) ) ; } }
@param node  file or directory