text: 
  export default function (state) {
    const { document, selection } = state
    const texts = document.getTextNodes()
    const first = texts.first()
    const range = selection.merge({
      anchorKey: first.key,
      anchorOffset: first.length,
      focusKey: first.key,
      focusOffset: first.length
    })
  
    return state
      .transform()
      .splitBlockAtRange(range)
      .apply()
  }
  