Interface LDEmitter

interface LDEmitter {
    emit(name: LDEmitterEventName, ...detail: any[]): void;
    eventNames(): string[];
    listenerCount(name: LDEmitterEventName): number;
    off(name: LDEmitterEventName, listener?: (...args: any[]) => void): void;
    on(name: LDEmitterEventName, listener: (...args: any[]) => void): void;
}