/**
* {@inheritDoc}
*
* @see java.util.NavigableSet#ceiling(java.lang.Object)
* @since 1.6
*/
public E ceiling(E e) {
return backingMap.ceilingKey(e);
}
/**
* @throws ClassCastException {@inheritDoc}
* @throws NullPointerException if the specified element is null and this set uses natural
* ordering, or its comparator does not permit null elements
* @since 1.6
*/
public E ceiling(E e) {
return m.ceilingKey(e);
}