docs: function compareRelids(a, b) {
              var aRel = self.getRelid(a),
                  bRel = self.getRelid(b);
  
              if (aRel < bRel) {
                  return -1;
              } else if (aRel > bRel) {
                  return 1;
              } else {
                  return 0;
              }
          }