export declare const DEFAULT_NODE_HEIGHT = 32;
export declare const MAX_DEFERRED_NODE_COUNT = 900;
export interface LiveRange {
    start: number;
    end: number;
}
export interface DeferNodesOptions {
    deferNodesUntilVisible?: boolean;
    maxLiveNodes?: number;
    parsedNodeCount: number;
    viewportPriority?: boolean;
    virtualizationEnabled: boolean;
}
export declare function resolveVirtualizationEnabled(parsedNodeCount: number, maxLiveNodes?: number): boolean;
export declare function resolveDeferNodes(options: DeferNodesOptions): boolean;
export declare function resolveAverageNodeHeight(nodeHeights: ReadonlyMap<number, number>, fallback?: number): number;
export declare function estimateHeightRange(start: number, end: number, nodeHeights: ReadonlyMap<number, number>, averageNodeHeight: number): number;
export declare function computeLiveRange(total: number, focusIndex: number, maxLiveNodes?: number, liveNodeBuffer?: number): LiveRange;