private void initChangesTree(JComponent root) {
    myChangesTree = new AsyncChangesTreeImpl.Changes(myProject, false, false);
    myChangesTree.setDoubleClickAndEnterKeyHandler(() -> new ShowDifferenceAction().performIfEnabled());

    new ShowDifferenceAction().registerCustomShortcutSet(root, null);

    myChangesTree.installPopupHandler(createChangesTreeActions());
  }
private void initChangesTree(JComponent root)