if (project.hasEntity(metadataClass)) {
EntityAccessor entityAccessor = project.getEntityAccessor(metadataClass);
// If it was loaded from XML, reset the pre-processed flag.
if (entityAccessor.loadedFromXML()) {
entityAccessor.clearPreProcessed();
} else {
// Was not loaded from XML and existed in the project.
if (excludeUnlistedClasses(metadataClass)) {
// Exclude unlisted classes is now false, remove it!