private static @Nullable String getTargetBytecodeVersion(@Nullable IdeaJavaLanguageSettings languageSettings) {
    if (languageSettings == null) return null;
    JavaVersion targetByteCodeVersion = languageSettings.getTargetBytecodeVersion();
    if (targetByteCodeVersion == null) return null;
    return targetByteCodeVersion.toString();
  }
private static @Nullable String getTargetBytecodeVersion(@Nullable IdeaJavaLanguageSettings languageSettings)