private void prepareServiceDocument() {
List<ApiListingReference> apiListingReferences = new ArrayList<ApiListingReference>();
for (Iterator<ApiListingReference> iterator = serviceDocument.apis()
.iterator(); iterator.hasNext();) {
ApiListingReference apiListingReference = iterator.next();
String newPath = apiListingReference.path();
if (useOutputFlatStructure) {
newPath = newPath.replaceAll("/", "_");
if (newPath.startsWith("_")) {
newPath = "/" + newPath.substring(1);
}