import type { Comparator } from './Comparator';
import type { JavaIterator } from './JavaIterator';
import type { SortedSet } from './SortedSet';
export interface NavigableSet<E> extends SortedSet<E> {
    comparator(): Comparator<E>;
    subSet(fromElement: E, toElement: E): SortedSet<E>;
    subSet(fromElement: E, fromInclusive: boolean, toElement: E, toInclusive: boolean): NavigableSet<E>;
    headSet(toElement: E): SortedSet<E>;
    headSet(toElement: E, inclusive: boolean): NavigableSet<E>;
    tailSet(fromElement: E): SortedSet<E>;
    tailSet(fromElement: E, inclusive: boolean): NavigableSet<E>;
    descendingSet(): NavigableSet<E>;
    iterator(): JavaIterator<E>;
    descendingIterator(): JavaIterator<E>;
    first(): E;
    last(): E;
    ceiling(e: E): E | null;
    floor(e: E): E | null;
    higher(e: E): E | null;
    lower(e: E): E | null;
    pollFirst(): E | null;
    pollLast(): E | null;
}
export declare function cast_java_util_NavigableSet<E>(obj: unknown): NavigableSet<E>;
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