export declare class MemoryManager {
    private itemCache;
    private maxCacheSize;
    private cleanupThreshold;
    private visibleRange;
    private totalItems;
    constructor(maxCacheSize?: number);
    setVisibleRange(range: {
        start: number;
        end: number;
    }): void;
    setTotalItems(total: number): void;
    get(key: number): any | null;
    set(key: number, value: any): void;
    has(key: number): boolean;
    delete(key: number): boolean;
    clear(): void;
    cleanupCache(): void;
    private getDistanceFromVisible;
    getStats(): {
        size: number;
        maxCacheSize: number;
        visibleItems: number;
        offScreenItems: number;
        memoryEstimate: number;
    };
    private estimateObjectSize;
    pruneEssential(): void;
    private isEssential;
    getSize(): number;
    getKeys(): number[];
}
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