code: I_CmsCmisObjectHelper getHelper(String objectId) {
  
          if (CmsUUID.isValidUUID(objectId)) {
              return getResourceHelper();
          } else if (CmsCmisRelationHelper.RELATION_PATTERN.matcher(objectId).matches()) {
              return getRelationHelper();
          } else {
              return null;
          }
      }
docs: Gets the correct helper object for a given object id to perform operations on the corresponding object.<p>
  
  @param objectId the object id
  
  @return the helper object to use for the given object id