EDIT

    protected EntitySelectionElement<TaxonName> select_nameUsedInSource;

    protected ExternalLinksSection externalLinks;

    public NomenclaturalSourceElement(CdmFormFactory formFactory, ICdmFormElement formElement, CdmBase cdmEntity,

            String label) {

        super(formFactory, formElement, cdmEntity, label);

    }

    @Override

        addControl(advancedSection);

        addElement(advancedSection);

        this.getLayoutComposite().layout();

    }

    @Override

    public EntitySelectionElement<Reference> getReferenceSelectionElement(){

        return selection_NomRef;

    }

    @Override

        }

        super.handleEvent(eventSource);

    }