private @Nullable Url buildTargetUrl() {
    RepositoryTreeNode locationNode = myBrowser.getSelectedNode();
    if (locationNode == null) return null;

    Url location = locationNode.getURL();
    String name = myNameField.getText();
    if (isEmpty(name)) return null;

    try {
      return append(location, name);
    }
    catch (SvnBindException e) {
      return null;
    }
  }
private @Nullable Url buildTargetUrl()