export declare class FrugalQuantileEstimator {
    readonly quantile: number;
    readonly minStep: number;
    private estimateValue?;
    private readonly upwardStepMultiplier;
    private readonly downwardStepMultiplier;
    constructor(quantile: number, minStep?: number);
    update(sample: number): number;
    get estimate(): number | undefined;
    reset(): void;
}