code: public EClass getIfcDerivedProfileDef() {
  		if (ifcDerivedProfileDefEClass == null) {
  			ifcDerivedProfileDefEClass = (EClass) EPackage.Registry.INSTANCE.getEPackage(Ifc2x3tc1Package.eNS_URI)
  					.getEClassifiers().get(144);
  		}
  		return ifcDerivedProfileDefEClass;
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated