private void checkStatusOk(Response response) {
        if (response.code() / 100 != 2) {
            throw new IllegalStateException(
                "Remove server returned an unexpected status code: " + response.code()
            );
        }
    }
Enrich pre-2.1.0.Final release.

Adds the missing ApiDefinition field to older Apiman export files.

@author Marc Savy {@literal <marc@blackparrotlabs.io>}
migration-assistant/src/main/java/io/apiman/migration/fix_pre_21/EnrichPre21ExportCommand.java