@Override
  public boolean supportsExtendedHexCharacter(RegExpChar regExpChar) {
    return regExpChar.getUnescapedText().charAt(1) == 'x' && hasAtLeastJdkVersion(regExpChar, JavaSdkVersion.JDK_1_7);
  }
@Override
  public boolean supportsExtendedHexCharacter(RegExpChar regExpChar)