code: public String removeFrom(CharSequence sequence) {
      String string = sequence.toString();
      int pos = indexIn(string);
      if (pos == -1) {
        return string;
      }
  
      char[] chars = string.toCharArray();
      int spread = 1;
  
      // This unusual loop comes from extensive benchmarking
      OUT:
      while (true) {
        pos++;
        while (true) {
          if (pos == chars.length) {
            break OUT;
          }
          if (matches(chars[pos])) {
            break;
          }
          chars[pos - spread] = chars[pos];
          pos++;
        }
        spread++;
      }
      return new String(chars, 0, pos - spread);
    }
docs: Returns a string containing all non-matching characters of a character sequence, in order. For
  example:
  
  <pre>{@code
  CharMatcher.is('a').removeFrom("bazaar")
  }</pre>
  
  ... returns {@code "bzr"}.