static String getDefaultSandbox() {
    @NonNls String defaultSandbox = "";
    try {
      defaultSandbox = new File(PathManager.getSystemPath()).getCanonicalPath() + File.separator + "plugins-sandbox";
    }
    catch (IOException e) {
      //can't be on running instance
    }
    return defaultSandbox;
  }
static String getDefaultSandbox()