text: /** @jsx h */
  
  import { Mark } from '../../../../..'
  import h from '../../../../helpers/h'
  
  export const input = <b />[0]
  
  export default function(t) {
    return t.updateMark(0, 1, Mark.create('bold'), { data: { x: 1 } })
  }
  
  export const output = input
  