message: Add a warning for dismissing invalid toasts
diff: @@ -68,6 +68,11 @@ export default class ToastStore extends EventEmitter {
  }
  dismissToast(key) {
  + if (!this.toasts.some(t => t.key === key)) {
  + console.warn(`No toast for ${key} found - cannot dismiss. Check your toastKey`);
  + return;
  + }
  +
  if (this.toasts[0] && this.toasts[0].key === key) {
  this.countSeen++;
  }
  