Full calendar react add our own div in headertoolbar

I want to add my own div which has a react select in full calendar headertoolbar left.

   <FullCalendar
      plugins={[ dayGridPlugin ]}
      initialView="dayGridMonth"
      weekends={false}
      events={[
        { title: 'event 1', date: '2019-04-01' },
      ]}
      headerToolbar={{
        left: '',
        center: 'prev,title,next',
        right: ''
      }}
    />

This is the sample Full calendar, In headertool left I need to add my own div for example

    <div className='option-select'>
    <label >
        Pick a fruit:
        <select name="selectedFruit">
          <option value="apple">Apple</option>
          <option value="banana">Banana</option>
          <option value="orange">Orange</option>
        </select>
    </label>
    </div>

Here in headertool left I need to add this div in it.
Is it possible to do it?