@Override
    public IExportWriter startBlobs() {
        validityCheckStart(GlobalElementsEnum.Blobs);
        lock(GlobalElementsEnum.Blobs);
        writeStartArray(GlobalElementsEnum.Blobs);
        return this;
    }
@see io.apiman.manager.api.exportimport.write.IExportWriter#endPolicyDefs()
manager/api/export-import/src/main/java/io/apiman/manager/api/exportimport/json/JsonExportWriter.java