100644 blob a0206741d3c503faebd515df6481b2827bce1b7e	characters.dart
100644 blob 63140c86f04a550684dd51575c621baba965bcbe	characters_impl.dart
100644 blob b661dafcf1c3df2bc743d8d864cd651283c1d71c	extensions.dart
040000 tree aedf8d877d56eee44ff2b2487a3e6dd000f8d6ff	grapheme_clusters