code: protected String clean(String value) {
          if (value == null) {
              return null;
          }
  
          if (value.startsWith("\"")
                  && value.endsWith("\"")) {
              value = value.substring(1, value.length() - 1);
          }
  
          return value.replaceAll(LINE_CONTINUATOR, "");
      }
docs: Cleans the value of the following:<ol>
  <li>Line continuator token - \\n or \\r\n</li>
  <li>Leading / Trailing double quotes</li>
  </ol>
  
  @param value {@link String} the value
  @return {@link String} the cleaned string, or <tt>null</tt>
  if <tt>value</tt> was <tt>null</tt>