Function getContextForSubtree

docs/external/js/react-dom.development.js:24389–24406

(parentComponent)

  }

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

    var fiber = get(parentComponent);
    var parentContext = findCurrentUnmaskedContext(fiber);

    if (fiber.tag === ClassComponent) {
      var Component = fiber.type;

      if (isContextProvider(Component)) {
        return processChildContext(fiber, Component, parentContext);
      }
    }

    return parentContext;
  }

  function findHostInstanceWithWarning(component, methodName) {
    {