if (elementName.equals("fluxBound")
&& groupList.equals(FBCList.listOfFluxBounds)) {
Model model = (Model) listOf.getParentSBMLObject();
FBCModelPlugin extendeModel = (FBCModelPlugin) model.getExtension(FBCConstants.namespaceURI);
FluxBound fluxBound = new FluxBound();
extendeModel.addFluxBound(fluxBound);
return fluxBound;
} else if (elementName.equals("objective")
&& groupList.equals(FBCList.listOfObjectives)) {