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