Function requiredContext

lib/assets/react-source/development/react.js:18098–18106

(c)

	var rootInstanceStackCursor = createCursor(NO_CONTEXT);

	function requiredContext(c) {
	  if (!(c !== NO_CONTEXT)) {
	    {
	      throw Error( "Expected host context to exist. This error is likely caused by a bug in React. Please file an issue." );
	    }
	  }

	  return c;
	}

	function getRootHostContainer() {
	  var rootInstance = requiredContext(rootInstanceStackCursor.current);