import { Initializer } from 'multi-integer-range';
/**
 * PriorityIntegerQueue is an integer queue which enables
 * more efficient loading storategy. It's backed by MultiIntegerRange.
 */
export default class PriorityIntegerQueue {
    private entries;
    constructor();
    append(value: Initializer, priority?: number): void;
    shift(): number | undefined;
    clear(): void;
}