Function getContextForSubtree

code/new-context-api/public/app.js:13415–13423

(parentComponent)

  function getContextForSubtree(parentComponent) {
    if (!parentComponent) {
      return emptyObject;
    }

    var fiber = get(parentComponent);
    var parentContext = findCurrentUnmaskedContext(fiber);
    return isContextProvider(fiber) ? processChildContext(fiber, parentContext) : parentContext;
  }

  function scheduleRootUpdate(current, element, currentTime, expirationTime, callback) {
    {