import { AbstractModuleRecord, CyclicModuleRecord, Realm, ScriptRecord, type ModuleRequestRecord, type PlainCompletion } from '#self';
export type ModuleCacheKeyObject = Pick<ModuleRequestRecord, 'Specifier' | 'Attributes'>;
export type ModuleCacheKey = string & {
    __ModuleCacheKey: never;
};
export type ModuleCacheLoader = (setCache: (value: PlainCompletion<AbstractModuleRecord>, cacheKey?: ModuleCacheKey) => void) => void;
export declare class ModuleCache {
    #private;
    static fromReferer(referrer: CyclicModuleRecord | ScriptRecord | Realm): ModuleCache;
    static toCacheKey(moduleRequest: ModuleCacheKeyObject): ModuleCacheKey;
    toCacheKey(moduleRequest: ModuleCacheKeyObject): ModuleCacheKey;
    set(key: ModuleCacheKey, result: PlainCompletion<AbstractModuleRecord>): void;
    load(key: ModuleCacheKey, loader: ModuleCacheLoader, callback: (result: PlainCompletion<AbstractModuleRecord>) => void): void;
    hasUnfinishedRequests(): boolean;
    untilAllRequestFinished(): Promise<PlainCompletion<AbstractModuleRecord>[]>;
}
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