void (@Nullable final List<? extends UsageInfo> infos) { PsiElement element = ContainerUtil.isEmpty(infos) ? null : getElementToSliceOn(infos); if (myBrowser instanceof Disposable) { Disposer.dispose((Disposable)myBrowser); myBrowser = null; } if (element != null) { myBrowser = createCallHierarchyPanel(element); if (myBrowser == null) { element = null; } } removeAll(); if (element == null) { JComponent titleComp = new JLabel(UsageViewBundle.message("select.the.usage.to.preview"), SwingConstants.CENTER); add(titleComp, BorderLayout.CENTER); } else { if (myBrowser instanceof Disposable) { Disposer.register(this, (Disposable)myBrowser); } JComponent panel = myBrowser.getComponent(); add(panel, BorderLayout.CENTER); } revalidate(); }