code: public List<CmsRelation> readRelations(CmsRelationFilter filter) throws CmsException {
  
          return m_securityManager.getRelationsForResource(m_context, null, filter);
      }
docs: Returns all relations matching the given filter.<p>
  
  @param filter the filter to match the relation
  
  @return all relations matching the given filter
  
  @throws CmsException if something goes wrong
  
  @see CmsSecurityManager#getRelationsForResource(CmsRequestContext, CmsResource, CmsRelationFilter)
  @see #getRelationsForResource(CmsResource, CmsRelationFilter)