import { SortedSet } from "./sortedset";
import { Iterator } from "./iterator";
export interface NavigableSet<E> extends SortedSet<E> {
    lower(e: E): E;
    floor(e: E): E;
    ceiling(e: E): E;
    higher(e: E): E;
    pollFirst(): E;
    pollLast(): E;
    descendingSet(): NavigableSet<E>;
    descendingIterator(): Iterator<E>;
    subSet(fromElement: E, toElement: E): NavigableSet<E>;
    subSet(fromElement: E, fromInclusive: boolean, toElement: E, toInclusive: boolean): NavigableSet<E>;
    headSet(toElement: E, inclusive: boolean): NavigableSet<E>;
    headSet(toElement: E): NavigableSet<E>;
    tailSet(fromElement: E, inclusive: boolean): NavigableSet<E>;
    tailSet(fromElement: E): NavigableSet<E>;
}