@NotNull
 public VirtualFile[] getOpenFiles() {
   final ArrayListSet<VirtualFile> files = new ArrayListSet<VirtualFile>();
   for (final EditorWindow myWindow : myWindows) {
     final EditorWithProviderComposite[] editors = myWindow.getEditors();
     for (final EditorWithProviderComposite editor : editors) {
       final VirtualFile file = editor.getFile();
       LOG.assertTrue(file.isValid(), Arrays.toString(editor.getProviders()));
       files.add(file);
     }
   }
   return VfsUtil.toVirtualFileArray(files);
 }
 @NotNull
 public VirtualFile[] getOpenFiles() {
   final ArrayListSet<VirtualFile> files = new ArrayListSet<VirtualFile>();
   for (final EditorWindow myWindow : myWindows) {
     final EditorWithProviderComposite[] editors = myWindow.getEditors();
     for (final EditorWithProviderComposite editor : editors) {
       VirtualFile file = editor.getFile();
       // background thread may call this method when invalid file is being removed
       // do not return it here as it will quietly drop out soon
       if (file.isValid()) {
         files.add(file);
       }
     }
   }
   return VfsUtil.toVirtualFileArray(files);
 }
 @NotNull
 public VirtualFile[] getSelectedFiles() {
   final ArrayListSet<VirtualFile> files = new ArrayListSet<VirtualFile>();
   for (final EditorWindow window : myWindows) {
     final VirtualFile file = window.getSelectedFile();
     if (file != null) {
       files.add(file);
     }
   }
   final VirtualFile[] virtualFiles = VfsUtil.toVirtualFileArray(files);
   final VirtualFile currentFile = getCurrentFile();
   if (currentFile != null) {
     for (int i = 0; i != virtualFiles.length; ++i) {
       if (Comparing.equal(virtualFiles[i], currentFile)) {
         virtualFiles[i] = virtualFiles[0];
         virtualFiles[0] = currentFile;
         break;
       }
     }
   }
   return virtualFiles;
 }