code: protected OntologyBuilder getOntologyBuilder(VersionRows vr, String rootModuleId, String rootModuleVersion,
              Map<String, String> metadata) {
          return new OntologyBuilder(vr, rootModuleId, rootModuleVersion, metadata);
      }
docs: Hook method for subclasses to override.
  
  @param vr
  @param rootModuleId
  @param rootModuleVersion
  @param includeInactiveAxioms
  @return