static ImageSurface swingDemoFont(Font font) {
  ret showImage("Font Demo: " + font, renderText(font, lowerAndUpperCaseAlphabet()));
}

static ImageSurface swingDemoFont(S fontSnippetID) {
  ret showImage("Font Demo: " + fontSnippetID, renderText(loadFont_cached(fontSnippetID), lowerAndUpperCaseAlphabet()));
}