@NotNull
  public TreeModelBuilder setSwitchedFiles(@NotNull MultiMap<@NlsSafe String, VirtualFile> switchedFiles) {
    if (switchedFiles.isEmpty()) return this;
    ChangesBrowserNode<?> subtreeRoot = createTagNode(ChangesBrowserNode.SWITCHED_FILES_TAG);
    for (@Nls String branchName : switchedFiles.keySet()) {
      List<VirtualFile> switchedFileList = sorted(switchedFiles.get(branchName), FILE_COMPARATOR);
      if (switchedFileList.size() > 0) {
        ChangesBrowserNode<?> branchNode = new ChangesBrowserStringNode(branchName);
        branchNode.markAsHelperNode();

        insertSubtreeRoot(branchNode, subtreeRoot);

        for (VirtualFile file : switchedFileList) {
          insertChangeNode(file, branchNode, ChangesBrowserNode.createFile(myProject, file));
        }
      }
    }
    return this;
  }
@NotNull
  public TreeModelBuilder setSwitchedFiles(@NotNull MultiMap<@NlsSafe String, VirtualFile> switchedFiles)