Function getContextForSubtree

lib/assets/react-source/development/react.js:27949–27966

(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) {
	  {