public final void renderHeaderWithContent() throws ExpressionCompileException {
Respond respond = RespondersForTesting.newRespond();
final WidgetChain widgetChain = new ProceedingWidgetChain();
final EvaluatorCompiler mock = new MvelEvaluatorCompiler(Object.class);
widgetChain.addWidget(new TextWidget("<meta name=\"thing\"/>", mock));
MvelEvaluatorCompiler compiler = new MvelEvaluatorCompiler(Object.class);
new HeaderWidget(widgetChain, Maps.<String, String>newHashMap(), compiler)