return sequence.subSequence(0, last + 1).toString();
      }
    }
    return "";
  }

  /**
   * Returns a string copy of the input character sequence, with each group of consecutive matching
   * BMP characters replaced by a single replacement character. For example:
   *
   * <pre>{@code
   * CharMatcher.anyOf("eko").collapseFrom("bookkeeper", '-')
   * }</pre>
   *

        return sequence.subSequence(0, last + 1).toString();
      }
    }
    return "";
  }

  /**
   * Returns a string copy of the input character sequence, with each group of consecutive matching
   * BMP characters replaced by a single replacement character. For example:
   *
   * <pre>{@code
   * CharMatcher.anyOf("eko").collapseFrom("bookkeeper", '-')
   * }</pre>
   *