export class Event2Args<T,M> {
    private handlers: { (data?: T,data2?: M): void; }[] = [];

    public on(handler: { (data?: T,data2?: M): void }) {
        this.handlers.push(handler);
    }

    public off(handler: { (data?: T,data2?: M): void }) {
        this.handlers = this.handlers.filter(h => h !== handler);
    }

    public allOff() {
        this.handlers = [];
    }

    public trigger(data?: T,data2?: M) {
        if (this.handlers) {
            this.handlers.slice(0).forEach(h => h(data,data2));
        }
    }
}