code: public boolean isMatching(CmsSiteMatcher matcher) {
  
          boolean result = m_siteMatcherSites.get(matcher) != null;
          if (!result) {
              // try to match the workplace site
              result = isWorkplaceRequest(matcher);
          }
          return result;
      }
docs: Returns <code>true</code> if the given site matcher matches any configured site,
  which includes the workplace site.<p>
  
  @param matcher the site matcher to match the site with
  
  @return <code>true</code> if the matcher matches a site