code: public EClass getIfcLibraryReference() {
  		if (ifcLibraryReferenceEClass == null) {
  			ifcLibraryReferenceEClass = (EClass) EPackage.Registry.INSTANCE.getEPackage(Ifc2x3tc1Package.eNS_URI)
  					.getEClassifiers().get(289);
  		}
  		return ifcLibraryReferenceEClass;
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated