import type { Observable, Subject } from 'rxjs';
export declare function setRxjsSubjectImplementation(lib: (typeof Subject) | false): void;
export declare function createEventEmitter<T>(name: string): EventEmitter<T>;
export declare interface EmitOptions<T> {
    detail: T;
    dispatchOnElement?: HTMLElement;
}
/**
 * @internal
 */
export declare class EventEmitter<T> {
    private readonly _name;
    private readonly _subject?;
    constructor(_name: string, _subject?: Subject<T> | undefined);
    asObservable(): Observable<T>;
    emit(options: EmitOptions<T>): void;
}