render() {
  return (
    <AtomTextEditor>
      <Marker range={[[11, 0], [12, 0]]}>
        <Decoration type='line' className='something' />
        <Decoration type='line-number' className='something-else' />
      </Marker>
      <MarkerLayer>
        <Marker range={[[0, 0], [10, 0]]} invalidate='never' />
        <Marker range={[[20, 0], [25, 6]]} invalidate='never' exclusive={true} />
        <Decoration type='overlay' position='head'>
           <div>
              What's up
           </div>
        </Decoration>
      </MarkerLayer>
    </AtomTextEditor>
  );
}