export type FhirVersion = 'R4' | 'R5' | 'R6';
export declare function preferredMajorFor(fhirVersion?: FhirVersion): string | undefined;
export declare function versionedCacheKey(canonical: string, requestedVersion?: string, fhirVersion?: FhirVersion): string;
export declare function isBetterPackageMatch(packageName: string, isPreferredFhirMajor: boolean, currentPackageName: string | null, currentIsPreferredFhirMajor: boolean): boolean;
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