export type EventMap = Record<string, unknown>;
type Listener<T> = (detail: T) => void;
export declare class EventEmitter<T extends EventMap> {
    private listeners;
    on<K extends keyof T>(type: K, listener: Listener<T[K]>, debounceMilliseconds?: number): Listener<T[K]>;
    once<K extends keyof T>(type: K, listener: Listener<T[K]>, debounceMilliseconds?: number): Listener<T[K]>;
    off<K extends keyof T>(type: K, listener: Listener<T[K]>): void;
    emit<K extends keyof T>(type: K, payload: T[K]): boolean;
    removeAllListeners(): void;
    waitFor<K extends keyof T>(type: K, predicate: (payload: T[K]) => boolean, timeoutMs?: number): Promise<T[K]>;
    private debounce;
}
export {};