code: @Override
  	public boolean eIsSet(int featureID) {
  		switch (featureID) {
  			case XtextPackage.CHARACTER_RANGE__LEFT:
  				return left != null;
  			case XtextPackage.CHARACTER_RANGE__RIGHT:
  				return right != null;
  		}
  		return super.eIsSet(featureID);
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated