in src/behaviors/emoji/support/is_emoji_unicode_supported.js [96:101]
function checkHorseRacingSkinToneComboEmojiSupport(unicodeSupportMap, emojiUnicode) {
const isHorseRacingSkinToneResult = isHorceRacingSkinToneComboEmoji(emojiUnicode);
return (
(unicodeSupportMap.horseRacing && isHorseRacingSkinToneResult) || !isHorseRacingSkinToneResult
);
}