Interface IEventBus

interface IEventBus {
    emit<T = unknown>(event: string, data?: T): void;
    off<T = unknown>(event: string, handler: EventHandler<T>): void;
    on<T = unknown>(event: string, handler: EventHandler<T>): void;
    once<T = unknown>(event: string, handler: EventHandler<T>): void;
    removeAllListeners(event?: string): void;
}