hunk.code_window:     prevProps.anchorPath = document.getPath(prevProps.anchorKey)
       delete prevProps.anchorKey
     }
     if (properties.focusKey) {
       properties.focusPath = document.getPath(properties.focusKey)
       delete properties.focusKey
     }
     if (prevProps.focusKey) {
       prevProps.focusPath = document.getPath(prevProps.focusKey)
  
hunk.labels: keep keep keep keep replace replace replace keep keep keep keep
hunk.after_edit:   if (props.focusKey) {
       props.focusPath = document.getPath(props.focusKey)
       delete props.focusKey
  
hunk.file_path: src/transforms/operations.js
hunk.type: replace
file: 
  export default function (state) {
    const { document, selection } = state
    const texts = document.getTexts()
    const first = texts.first()
    const second = texts.last()
    const range = selection.merge({
      anchorKey: first.key,
      anchorOffset: 2,
      focusKey: second.key,
      focusOffset: 2
    })
  
    return state
      .transform()
      .toggleMarkAtRange(range, 'bold')
      .apply()
  }
  