anchor.diff:    min-width: 180px;
     transition: flex-grow 0.25s cubic-bezier(.7, .25, .25, .7);
   }
  -:host.today {
  +:host:hover, :host.today {
     flex-grow: 1.5;
  +}
  +:host.today:hover {
  +  flex-grow: 2.0;
   }
   :host {
     display: flex;
  
positive.code:   </schedule-time-slot>
  </div>
  ''',
      host: const {
        '(mouseenter)': r'expand($event.target)',
        '(mouseleave)': r'shrink($event.target)'
      },
      styles: const [
        '''
  :host {
  
negative.code:   @Input()
    Day day;
  
    String timeSlotId(int index, TimeSlot timeSlot) =>
        timeIdFormat.format(timeSlot.start);
  }
  