code: protected String parseOptionalStringValue(final String path) {
  
          final I_CmsXmlContentValue value = m_xml.getValue(path, m_locale);
          if (value == null) {
              return null;
          } else {
              return value.getStringValue(null);
          }
      }
docs: Helper to read an optional String value.
  @param path The XML path of the element to read.
  @return The String value stored in the XML, or <code>null</code> if the value could not be read.