code: public static int getHtmlCodeByHtmlEntity(String htmlEntity)
      {
          Entity entity = fHtmlToWiki.get(htmlEntity);
          return entity != null ? entity.fHtmlCode : 0;
      }
docs: Returns an HTML code corresponding to the specified HTML entity.
  
  @param htmlEntity the HTML entity to transform to the corresponding HTML
  code
  @return an HTML code corresponding to the specified HTML entity