import type { Ref } from 'vue';
import type { WaterfallProps } from '../types/waterfall';
import type { Nullable } from '../types/util';
export declare function useLayoutVirtual(props: WaterfallProps, colWidth: Ref<number>, cols: Ref<number>, offsetX: Ref<number>, waterfallWrapper: Ref<Nullable<HTMLElement>>, horizontalOrder: Boolean, heightDifference: number): {
    wrapperHeight: Ref<number>;
    layoutHandle: (isFix?: boolean) => Promise<boolean>;
};