code: public void project_serviceName_instance_group_groupId_DELETE(String serviceName, String groupId) throws IOException {
  		String qPath = "/cloud/project/{serviceName}/instance/group/{groupId}";
  		StringBuilder sb = path(qPath, serviceName, groupId);
  		exec(qPath, "DELETE", sb.toString(), null);
  	}
docs: Delete a group
  
  REST: DELETE /cloud/project/{serviceName}/instance/group/{groupId}
  @param groupId [required] Group id
  @param serviceName [required] Project name