code: public PurgeResponse purge(PurgeRequest request) {
          InternalRequest internalRequest = this.createRequest(request, HttpMethodName.POST, CACHE, "purge");
          this.attachRequestToBody(request, internalRequest);
          return this.invokeHttpClient(internalRequest, PurgeResponse.class);
      }
docs: Post purge request
  @param request The request containing all of the URLs to be purged.
  @return Result of the purge operation returned by the service.