code: @Override
  	public boolean eIsSet(int featureID) {
  		switch (featureID) {
  			case XtextPackage.ABSTRACT_METAMODEL_DECLARATION__EPACKAGE:
  				return ePackage != null;
  			case XtextPackage.ABSTRACT_METAMODEL_DECLARATION__ALIAS:
  				return ALIAS_EDEFAULT == null ? alias != null : !ALIAS_EDEFAULT.equals(alias);
  		}
  		return super.eIsSet(featureID);
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated