code: public void deleteSecurityGroup(DeleteSecurityGroupRequest request) {
          checkNotNull(request, "request should not be null.");
          checkStringNotEmpty(request.getSecurityGroupId(), "request securityGroupId should not be empty.");
          InternalRequest internalRequest =
                  this.createRequest(request, HttpMethodName.DELETE, SECURITYGROUP_PREFIX, request.getSecurityGroupId());
          invokeHttpClient(internalRequest, AbstractBceResponse.class);
      }
docs: Deleting the specified SecurityGroup.
  
  @param request The request containing all options for deleting the specified SecurityGroup owned by user.