try {
                if (source instanceof PersistentModuleSource) {
                    PersistentModuleSource persistentModuleSource = (PersistentModuleSource) source;
                    int codecId = assertValidId(persistentModuleSource.getCodecId());
                    encoder.writeSmallInt(codecId);
                    PersistentModuleSource.Codec<PersistentModuleSource> codec = Cast.uncheckedCast(moduleSourceCodecs.get(codecId));