code: @Override
  	public void eUnset(int featureID) {
  		switch (featureID) {
  			case AfplibPackage.PTD1__XPBASE:
  				setXPBASE(XPBASE_EDEFAULT);
  				return;
  			case AfplibPackage.PTD1__YPBASE:
  				setYPBASE(YPBASE_EDEFAULT);
  				return;
  			case AfplibPackage.PTD1__XPUNITVL:
  				setXPUNITVL(XPUNITVL_EDEFAULT);
  				return;
  			case AfplibPackage.PTD1__YPUNITVL:
  				setYPUNITVL(YPUNITVL_EDEFAULT);
  				return;
  			case AfplibPackage.PTD1__XPEXTENT:
  				setXPEXTENT(XPEXTENT_EDEFAULT);
  				return;
  			case AfplibPackage.PTD1__YPEXTENT:
  				setYPEXTENT(YPEXTENT_EDEFAULT);
  				return;
  			case AfplibPackage.PTD1__RESERVED:
  				setRESERVED(RESERVED_EDEFAULT);
  				return;
  		}
  		super.eUnset(featureID);
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated