docs: public XFeatureCall createReferenceToSuper() {
  		final XExpression expr = getXExpression();
  		XtendTypeDeclaration type = EcoreUtil2.getContainerOfType(expr, XtendTypeDeclaration.class);
  		JvmType jvmObject = getAssociatedElement(JvmType.class, type, expr.eResource());
  		final XFeatureCall superFeature = XbaseFactory.eINSTANCE.createXFeatureCall();
  		JvmIdentifiableElement feature;
  		if (jvmObject instanceof JvmDeclaredType) {
  			feature = ((JvmDeclaredType) jvmObject).getExtendedClass().getType();
  		} else {
  			feature = findType(expr, getQualifiedName(type)).getType();
  			if (feature instanceof JvmDeclaredType) {
  				feature = ((JvmDeclaredType) feature).getExtendedClass().getType();
  			} else {
  				feature = null;
  			}
  		}
  		if (feature == null) {
  			return null;
  		}
  		superFeature.setFeature(feature);
  		return superFeature;
  
  	}