is it possible to achieve IsAMemberOf(“groupName”) functionality using NXQL code.. If so, could u pls provide me with one..

Hi, I'm using the Nuxeo 5.9.3 to manage the picture files and I'm using the Drupal with the Cmis module to get the images from Nuxeo. I need to have more fields added to the picture like a “reference” field. I'm using the Nuxeo Studio to do this ...