} catch (DuplicateRealmException e) {
                    realmId = id + '-' + random.nextInt();
                }
            }
        }
    }

    public ClassRealm getMavenApiRealm() {
        return mavenApiRealm;
    }

    @Override
    public ClassRealm getMaven4ApiRealm() {
        return maven4ApiRealm;
    }

    /**

     * Gets the class realm exposing the Maven API. This is basically a restricted view on the Maven core realm.
     *
     * @return The class realm exposing the Maven API, never {@code null}.
     */
    ClassRealm getMavenApiRealm();

    /**
     * Gets the class realm exposing the Maven 4 API. This is basically a restricted view on the Maven core realm.
     *
     * @return The class realm exposing the Maven API, never {@code null}.
     */