/**
 * Shared helpers for validating and normalizing route param constraints.
 * @internal
 */
export declare const getNormalizedRouteConstraint: (constraint: string) => string;
export declare const getRouteConstraintRegex: (constraint: string) => RegExp;
export declare const routeConstraintMatches: (constraint: string, value: string) => boolean;
export declare const clearRouteConstraintCache: () => void;
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