code: public static String getStringWithFilePathOrClasspath(
              String filePathOrClasspath, String charsetName) {
          return getStringAsOptWithFilePath(filePathOrClasspath, charsetName)
                  .orElseGet(
                          () -> getStringAsOptWithClasspath(
                                  filePathOrClasspath,
                                  charsetName).orElse(null));
      }
docs: Gets string with file path or classpath.
  
  @param filePathOrClasspath the file path or classpath
  @param charsetName         the charset name
  @return the string with file path or classpath