如何从Flutter中的字符串中提取表情符号？

import 'dart:core';

void main() {
  String text = 'Hello World! 😊';

  RegExp emojiRegex = RegExp(
    r'[\u{1F600}-\u{1F64F}]|[\u{1F300}-\u{1F5FF}]|[\u{1F680}-\u{1F6FF}]|[\u{2600}-\u{26FF}]|[\u{2700}-\u{27BF}]|[\u{1F900}-\u{1F9FF}]|[\u{1F1E6}-\u{1F1FF}]|[\u{1F191}-\u{1F251}]|[\u{1F600}-\u{1F636}]|[\u{1F681}-\u{1F6C5}]|[\u{1F30D}-\u{1F567}]',
    unicode: true,
  );

  Iterable<RegExpMatch> matches = emojiRegex.allMatches(text);

  List<String> emojis = [];

  for (RegExpMatch match in matches) {
    emojis.add(match.group(0)!);
  }

  print(emojis); // 输出提取到的表情符号
}