// execute
ObjectList checkedout = service.getCheckedOutDocs(repositoryId, folderId, filter, orderBy,
includeAllowableActions, includeRelationships, renditionFilter, maxItems, skipCount, null);
if (checkedout == null) {
throw new CmisRuntimeException("Checked out list is null!");
}
TypeCache typeCache = new TypeCache(repositoryId, service);
JSONObject jsonCheckedOut = JSONConverter.convert(checkedout, typeCache);