code: public <T, E extends Exception> T map(Try.Function<? super String, T, E> mapper) throws E {
          return mapper.apply(toString());
      }
docs: <pre>
  The underline {@code StringBuilder} will be recycled after this method is called if {@code resueStringBuilder} is set to {@code true},
  and should not continue to this instance.
  </pre>
  
  @param mapper
  @return