static Map<Method, Method> toFallbackMethod(Map<Method, MethodHandler> dispatch) {
		Map<Method, Method> result = new LinkedHashMap<>();
		for (Method method : dispatch.keySet()) {
			method.setAccessible(true);
			result.put(method, method);
		}
		return result;
	}
{@link InvocationHandler} handle invocation that protected by Sentinel.

@author <a href="mailto:fangjian0423@gmail.com">Jim</a>
spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-sentinel/src/main/java/com/alibaba/cloud/sentinel/feign/SentinelInvocationHandler.java