code: @Override
  	public boolean eIsSet(int featureID) {
  		switch (featureID) {
  			case XtextPackage.ABSTRACT_RULE__NAME:
  				return NAME_EDEFAULT == null ? name != null : !NAME_EDEFAULT.equals(name);
  			case XtextPackage.ABSTRACT_RULE__TYPE:
  				return type != null;
  			case XtextPackage.ABSTRACT_RULE__ALTERNATIVES:
  				return alternatives != null;
  			case XtextPackage.ABSTRACT_RULE__ANNOTATIONS:
  				return annotations != null && !annotations.isEmpty();
  		}
  		return super.eIsSet(featureID);
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated