code: function (update) {
      LOG.warn('onPosition called, mover: ' + update.ident + ' pos:');
      LOG.warn(update.pos);
      
      // notify client
      LOG.warn('notify: ' + update.to);
      if (l_nodes.hasOwnProperty(update.to)) {
          var node = l_nodes[update.to];
          SR.EventManager.send('NODE_UPDATE', {ident: update.ident, pos: update.pos}, [node.conn.connID]);
      }
  }
docs: return the update of a particular node update: {ident: string, pos: {x: number, y: number}, to: string}