public bool ContentEqualsIgnoreCase(ICharSequence other) => CharUtil.ContentEqualsIgnoreCase(this, other);
 public bool ContentEquals(ICharSequence other) => CharUtil.ContentEquals(this, other);
 public bool RegionMatchesIgnoreCase(int thisStart, ICharSequence seq, int start, int length) =>
 CharUtil.RegionMatchesIgnoreCase(this, this.offset + thisStart, seq, start, length);
 public int IndexOf(char ch, int start = 0) => CharUtil.IndexOf(this, ch, start);
 public bool RegionMatches(int thisStart, ICharSequence seq, int start, int length) =>
 CharUtil.RegionMatches(this, thisStart, seq, start, length);