code: public GetDomainCacheTTLResponse getDomainCacheTTL(GetDomainCacheTTLRequest request) {
          checkNotNull(request, "The parameter request should NOT be null.");
          InternalRequest internalRequest = createRequest(request, HttpMethodName.GET, DOMAIN, request.getDomain(), "config");
          internalRequest.addParameter("cacheTTL","");
          return invokeHttpClient(internalRequest, GetDomainCacheTTLResponse.class);
      }
docs: Get cache policies of specified domain acceleration.
  
  @param request The request containing all of the options related to the domain.
  @return Detailed information about cache policies.