import { SourceRef } from '@signalk/server-api';
interface SourcePriority {
    sourceRef: SourceRef;
    timeout: number;
}
export interface SourcePrioritiesData {
    [path: string]: SourcePriority[];
}
export type ToPreferredDelta = (delta: any, now: Date, selfContext: string) => any;
export declare const getToPreferredDelta: (sourcePrioritiesData: SourcePrioritiesData, unknownSourceTimeout?: number) => ToPreferredDelta;
export {};