export interface VirtualRangeOptions {
    count: number;
    scrollTop: number;
    viewportHeight: number;
    itemHeight: number;
    overscan: number;
}
export interface VirtualRange {
    start: number;
    end: number;
    offset: number;
    total: number;
}
export declare const normalizeItemHeight: (value: number) => number;
export declare const getVirtualRange: ({ count, scrollTop, viewportHeight, itemHeight, overscan, }: VirtualRangeOptions) => VirtualRange;