import Observer from 'observer';

const observerInterface = new Observer();

export default observerInterface;

observerInterface.subscribe('TOAST_PUSH', (args) => this.push(args));

...

push(options) {
  const message = {
    ...options,
    id: Toasts.idFactory(),
  };
  this.setState((state) => [...state.queue, message]);
}

observerInterface.emit('TOAST_PUSH', args);