import type { ResolvedEntry } from "./stream-types.js";
import type { RouterOrderingToken } from "./types.js";
export declare function isValidOrderingToken(value: unknown): value is RouterOrderingToken;
export declare function requireOptionalBooleanHookResult(value: unknown, name: string): boolean;
export declare function optionalMetricHookValue(hook: ((candidate: ResolvedEntry) => number | undefined) | undefined, candidate: ResolvedEntry): number | undefined;
export declare function snapshotCandidateForStateHook(candidate: ResolvedEntry): ResolvedEntry;
export declare function invokeReadOnlyCandidateHook<Args extends unknown[], Result>(hook: ((candidate: ResolvedEntry, ...args: Args) => Result) | undefined, candidate: ResolvedEntry, ...args: Args): Result | undefined;
export declare function captureOptionalHook<T>(source: object, key: string): T | undefined;
export declare function captureRequiredHook<T>(source: object, key: string): T;
export declare function tryCaptureOptionalHook<T>(source: object, key: string): {
    error?: unknown;
    value?: T;
};