import type { RumPerformanceResourceTiming } from '../../browser/performanceObservable';
import type { RumConfiguration } from '../configuration';
import { getNavigationEntry } from '../../browser/performanceUtils';
export declare function retrieveInitialDocumentResourceTiming(configuration: RumConfiguration, callback: (timing: RumPerformanceResourceTiming) => void, getNavigationEntryImpl?: typeof getNavigationEntry): void;