code: @Override
      public List<BounceProxyRecord> getAssignableBounceProxies() {
          return directory.values()
                          .stream()
                          .filter(Objects::nonNull)
                          .filter(r -> r.getStatus().isAssignable())
                          .collect(Collectors.toList());
      }
docs: /*
  (non-Javadoc)
  
  @see
  io.joynr.messaging.bounceproxy.controller.directory.BounceProxyDirectory
  #getAssignableBounceProxies()