docs: @Override
      public List<String> getRoles(String name, String... domain) {
          if (domain.length == 1) {
              name = domain[0] + "::" + name;
          } else if (domain.length > 1) {
              throw new Error("error: domain should be 1 parameter");
          }
  
          if (!hasRole(name)) {
              throw new Error("error: name does not exist");
          }
  
          List<String> roles = createRole(name).getRoles();
          if (domain.length == 1) {
              for (int i = 0; i < roles.size(); i ++) {
                  roles.set(i, roles.get(i).substring(domain[0].length() + 2, roles.get(i).length()));
              }
          }
          return roles;
      }