/**
 * Keeps track of the number of values which have been consumed, as well as the timeframe during which they were
 * consumed. The `throttle` method can be used to throttle if more values are consumed than allowed at any given moment
 * in time (overconsumption), as dictated by the `valuesPerMinute` argument passed into the constructor.
 */
export default class Throttler {
    protected count: number;
    protected readonly start: number;
    protected readonly valuesPerSixSeconds: number;
    constructor(valuesPerMinute: number);
    /**
     * Registers that the passed number of values have been consumed.
     */
    tally(count: number): void;
    /**
     * If more values have been consumed than allowed at this moment in time (overconsumption), a promise is returned
     * which is resolved as soon as this is no longer the case. Otherwise, `undefined` is returned.
     */
    throttle(): Promise<void> | undefined;
}