import { FlowBlock, Layout } from '../../../../../../../layout-engine/contracts/src/index.js';
export declare function createLayoutMetrics(perf: Performance | undefined, startMark: number | undefined, layout: Layout, blocks: FlowBlock[]): {
    durationMs: number;
    blockCount: number;
    pageCount: number;
} | undefined;
//# sourceMappingURL=PresentationLayoutMetrics.d.ts.map