export declare class MeasurementSystem {
    private resizeObserver;
    private measurements;
    private widthMeasurements;
    private observedElements;
    private observedAxis;
    private pendingUpdates;
    private pendingWidthUpdates;
    private rafId;
    private onMeasure;
    private onMeasureWidth;
    flush: (cb: () => void) => void;
    constructor();
    startMeasuring(onMeasure: (index: number, size: number) => void, onMeasureWidth?: (index: number, size: number) => void): void;
    observeItem(index: number, element: HTMLElement, axis?: 'height' | 'width'): void;
    /**
     * Unobserve item
     */
    unobserveItem(element: HTMLElement): void;
    private handleResize;
    setFlush(flush: (cb: () => void) => void): void;
    syncMeasure(index: number, element: HTMLElement, axis?: 'height' | 'width'): void;
    /**
     * Preserve measurements
     */
    stopMeasuring(): void;
    getMeasurement(index: number): number | undefined;
    getWidthMeasurement(index: number): number | undefined;
    getAllMeasurements(): Map<number, number>;
    getAllWidthMeasurements(): Map<number, number>;
    clearPending(): void;
    clearMeasurements(): void;
    destroy(): void;
}
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