code: public String getUserLastModifiedName(CmsObject cms) {
  
          try {
              return CmsPrincipal.readPrincipalIncludingHistory(cms, getUserLastModified()).getName();
          } catch (CmsException e) {
              return getUserLastModified().toString();
          }
      }
docs: Returns the name of the user that last modified this resource.<p>
  
  @param cms the current cms context
  
  @return the name of the user that last modified this resource