docs: @Override
      @PreAuthorize(SpringEvalExpressions.HAS_AUTH_SYSTEM_ADMIN)
      public ResponseEntity<Collection<MgmtSystemCache>> getCaches() {
          final Collection<String> cacheNames = cacheManager.getCacheNames();
          return ResponseEntity
                  .ok(cacheNames.stream().map(cacheManager::getCache).map(this::cacheRest).collect(Collectors.toList()));
      }