export declare class AsyncCache<T> {
    inflightCache: Map<string, Promise<T>>;
    resolvedCache: Map<string, T>;
    clear(): void;
    has(key: string): boolean;
    get(key: string): Promise<T | undefined>;
    tryGetSync(key: string): T | undefined;
    getSync(key: string, errorMessage?: string): T;
    set(key: string, promise: Promise<T>): Promise<T | undefined>;
    setSync(key: string, value: T): void;
    delete(key: string): void;
}
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