/**
 * Await events library like EventEmitter
 * @author imcuttle
 */
declare type SymbolKey = string | any;
declare class AwaitEventEmitter {
    _events: Record<any | SymbolKey, Array<{
        fn: Function;
    }>>;
    addListener(type: SymbolKey, fn: Function): this;
    on(type: SymbolKey, fn: Function): this;
    prependListener(type: SymbolKey, fn: Function): this;
    prepend(type: SymbolKey, fn: Function): this;
    prependOnceListener(type: SymbolKey, fn: Function): this;
    prependOnce(type: SymbolKey, fn: Function): this;
    listeners(type: SymbolKey): Function[];
    once(type: SymbolKey, fn: Function): this;
    removeAllListeners(): void;
    off(type: SymbolKey, nullOrFn?: Function): boolean;
    removeListener(type: SymbolKey, nullOrFn?: Function): boolean;
    emit(type: SymbolKey, ...args: unknown[]): Promise<boolean>;
    emitSync(type: SymbolKey, ...args: unknown[]): boolean;
}
export default AwaitEventEmitter;