RealmConfiguration.Builder builder = new RealmConfiguration.Builder();
    builder.schemaVersion(SCHEMA_VERSION); // SCHEMA_VERSION = 1
    builder.migration(new Migration());

Realm.setDefaultConfiguration(builder.build());
Realm.getDefaultInstance().close();

builder.schemaVersion(SCHEMA_VERSION); // SCHEMA_VERSION = 1

DynamicRealm dynamicRealm = DynamicRealm.getInstance(Realm.getDefaultConfiguration());
long version = dynamicRealm.getVersion();
dynamicRealm.close();