@Override
	protected String getPubSubEndpointRouting(AbstractEndpoint endpoint) {
		return TestUtils.getPropertyValue(endpoint, "handler.delegate.exchangeNameExpression", SpelExpression.class).getExpressionString();
	}
@author Mark Fisher
@author Gary Russell
spring-xd-dirt/src/test/java/org/springframework/xd/dirt/integration/bus/rabbit/RabbitMessageBusTests.java