code: public List<String> getUsersForRole(String name) {
          try {
              return model.model.get("g").get("g").rm.getUsers(name);
          } catch (Error e) {
              if (!e.getMessage().equals("error: name does not exist")) {
                  throw e;
              }
          }
          return null;
      }
docs: getUsersForRole gets the users that has a role.
  
  @param name the role.
  @return the users that has the role.