/**
 * fast map allows for very quick lookups of objects with a unique key
 */
export declare class FastMap<T> {
    private mapObject;
    isUniqueKey(keyArg: string): boolean;
    has(keyArg: string): boolean;
    get size(): number;
    addToMap(keyArg: string, objectArg: T, optionsArg?: {
        force: boolean;
    }): boolean;
    getByKey(keyArg: string): T | undefined;
    removeFromMap(keyArg: string): T;
    getKeys(): string[];
    values(): T[];
    entries(): [string, T][];
    clean(): void;
    /**
     * returns a new Fastmap that includes all values from this and all from the fastmap in the argument
     */
    concat(fastMapArg: FastMap<T>): FastMap<T>;
    /**
     * tries to merge another Fastmap
     * Note: uniqueKeyCollisions will cause overwrite
     * @param fastMapArg
     */
    addAllFromOther(fastMapArg: FastMap<T>): void;
    find(findFunctionArg: (mapItemArg: T) => Promise<boolean>): Promise<T>;
    [Symbol.iterator](): Iterator<[string, T]>;
}