}
      return result.toString();
    }

    @Override
    public String collapseFrom(CharSequence sequence, char replacement) {
      return (sequence.length() == 0) ? "" : String.valueOf(replacement);
    }

    @Override
    public String trimFrom(CharSequence sequence) {
      checkNotNull(sequence);
      return "";
    }

    @Override

      }
      return result.toString();
    }

    @Override
    public String collapseFrom(CharSequence sequence, char replacement) {
      return (sequence.length() == 0) ? "" : String.valueOf(replacement);
    }

    @Override
    public String trimFrom(CharSequence sequence) {
      checkNotNull(sequence);
      return "";
    }

    @Override