@NotNull
  private static Color findColorByKey(String... colorKeys) {
    Color c = null;
    for (String key : colorKeys) {
      c = UIManager.getColor(key);
      if (c != null) {
        break;
      }
    }

    assert c != null : "Can't find color for keys " + Arrays.toString(colorKeys);
    return c;
  }
@NotNull
  private static Color findColorByKey(String... colorKeys)