def setFeatureContainer(self, c):
        self._grid.removeAllComponents()
        features = c.getItemIds()
        rootSet = CssLayout()
        rootTitle = None
        highlightRow = CssLayout()
        highlightRow.setStyleName('highlight-row')
        sampleCount = 0
        for f in features:
            if isinstance(f, FeatureSet):
                if c.isRoot(f):
                    if rootTitle is not None:
                        rootTitle.setValue(('<em>' + str(sampleCount)
                                + ' samples</em>' + rootTitle.getValue()))
                        sampleCount = 0
                    desc = f.getDescription()
                    try:
                        idx = desc.index(".")
                    except ValueError:
                        idx = -1
                    rootTitle = Label("<h2>"
                            + f.getName()
                            + "</h2><span>"
                            + desc[:idx * 1]
                            + "</span>", Label.CONTENT_XHTML)
                    rootTitle.setSizeUndefined()
                    if f.getRelatedFeatures() is not None:
                        rootTitle.setValue('<em>'
                                + len(f.getRelatedFeatures())
                                + ' samples</em>'
                                + rootTitle.getValue())
                    rootSet = CssLayout()
                    rootSet.setStyleName('root')
                    rootTitle.setStyleName('root-section')
                    self._grid.addComponent(rootTitle)
                    self._grid.addComponent(rootSet)
            else:
                sampleCount += 1
                resId = '75-' + f.getIconName()
                res = self._app.getSampleIcon(resId)
                if rootSet.getParent() is None:
                    # This sample is directly inside a non root feature
                    # set, we present these with higher priority
                    if rootTitle is None:
                        parent = self._app._allFeatures.getParent(f)
                        rootTitle = Label("<h2>" + parent.getName()
                                + "</h2>", Label.CONTENT_XHTML)
                        rootTitle.setStyleName('root-section highlights-title')
                        rootTitle.setSizeUndefined()
                        self._grid.addComponent(rootTitle)
                        if parent.getDescription() is not None:
                            desc = Label(parent.getDescription(),
                                    Label.CONTENT_XHTML)
                            desc.setStyleName('highlights-description')
                            desc.setSizeUndefined()
                            self._grid.addComponent(desc)
                    # Two samples per row
                    if sampleCount % 2 == 1:
                        highlightRow = CssLayout()
                        highlightRow.setStyleName('highlight-row')
                        self._grid.addComponent(highlightRow)
                    l = CssLayout()
                    l.setStyleName('highlight')
                    er = ExternalResource('#' + f.getFragmentName())
                    sample = ActiveLink(f.getName(), er)
                    sample.setIcon(res)
#                    if f.getSinceVersion().isNew():
#                        sample.addStyleName('new')
                    l.addComponent(sample)
                    if (f.getDescription() is not None
                            and f.getDescription() != ''):
                        d = f.getDescription()
                        desc = Label(d[:d.index(".") + 1], Label.CONTENT_XHTML)
                        desc.setSizeUndefined()
                        l.addComponent(desc)
                    highlightRow.addComponent(l)
                else:
                    sample = ActiveLink(f.getName(),
                            ExternalResource('#' + f.getFragmentName()))
                    sample.setStyleName(BaseTheme.BUTTON_LINK)
                    sample.addStyleName('screenshot')
                    if (f.getDescription() is not None
                            and f.getDescription() != ''):
                        desc = f.getDescription()
                        try:
                            idx = desc.index('.')
                        except ValueError:
                            idx = -1
                        sample.setDescription(desc[:idx + 1])
#                    if f.getSinceVersion().isNew():
#                        sample.addStyleName('new')
                    sample.setIcon(res)
                    rootSet.addComponent(sample)
        if rootTitle is not None:
            rootTitle.setValue('<em>' + str(sampleCount) + ' samples</em>'
                    + rootTitle.getValue())
dataset/ETHPy150Open rwl/muntjac/muntjac/demo/sampler/SamplerApplication.py/FeatureGrid.setFeatureContainer/operator `+` -> `*`