message: yarn lint, take 5 ...
diff: import { serializeDocument } from '../documents/reducer'
  import { createSelector, createSubReducer } from '../helpers'
  -import { pureInitRoot, PureInitRootAction } from './actions'
  import { ReturnTypeFromSelector } from '../types'
  +import { pureInitRoot, PureInitRootAction } from './actions'
  export const rootReducer = createSubReducer('root', null, {
  [pureInitRoot.type](_rootState, _action: PureInitRootAction) {
  