public static @NlsSafe String getDefaultFontName() {
    if (SystemInfo.isJetBrainsJvm) {
      return JETBRAINS_MONO;
    }
    if (SystemInfo.isWindows) {
      return WINDOWS_DEFAULT_FONT_FAMILY;
    }
    if (SystemInfoRt.isMac) {
      return MAC_OS_DEFAULT_FONT_FAMILY;
    }
    if (SystemInfoRt.isLinux && !GraphicsEnvironment.isHeadless() && !ApplicationManager.getApplication().isCommandLine()) {
      for (Font font : GraphicsEnvironment.getLocalGraphicsEnvironment().getAllFonts()) {
        if (LINUX_DEFAULT_FONT_FAMILY.equals(font.getName())) {
          return font.getFontName();
        }
      }
    }
    return FALLBACK_FONT_FAMILY;
  }
public static @NlsSafe String getDefaultFontName()