NavigationGutterIconBuilder ignores setCellRenderer

Hi,

I have the following code:

NavigationGutterIconBuilder<PsiElement> builder =
        NavigationGutterIconBuilder.create(AllIcons.FileTypes.XsdFile)
                .setTargets(targets)
                .setCellRenderer(new CustomPsiElementCellRenderer());
result.add(builder.createLineMarkerInfo(xmlTypeNamespace));

Class CustomPsiElementCellRenderer extends DefaultPsiElementCellRenderer and overrides many methods, but none of them are used (getIconFlags, getElementText, getContainerText etc.). Am I doing something wrong? It looks like CustomPsiElementCellRenderer is not being used.