code: public static Optional<String> getStringAsOptWithFilePath(
              String filePath, String charsetName) {
          return JMOptional
                  .getOptional(JMFiles.readString(filePath, charsetName));
      }
docs: Gets string as opt with file path.
  
  @param filePath    the file path
  @param charsetName the charset name
  @return the string as opt with file path