code: @Deprecated
      public Set<IConnection> lookupConnections(IClient client) {
          HashSet<IConnection> result = new HashSet<IConnection>(1);
          if (clients.contains(client)) {
              for (IClient cli : clients) {
                  if (cli.equals(client)) {
                      Set<IConnection> set = cli.getConnections();
                      if (set.size() > 1) {
                          log.warn("Client connections exceeded expected single count; size: {}", set.size());
                      }
                      result.add(set.iterator().next());
                      break;
                  }
              }
          }
          return result;
      }
docs: {@inheritDoc}