Function getStateFromUpdate

code/redux/public/app.js:8236–8243

(update, instance, prevState, props)

}

function getStateFromUpdate(update, instance, prevState, props) {
  var partialState = update.partialState;
  if (typeof partialState === 'function') {
    return partialState.call(instance, prevState, props);
  } else {
    return partialState;
  }
}

function processUpdateQueue(current, workInProgress, queue, instance, props, renderExpirationTime) {
  if (current !== null && current.updateQueue === queue) {