code: function(target, options) {
                          var poller = findPoller(target);
  
                          if (!poller) {
                              poller = new Poller(target, options);
                              pollers.push(poller);
                              poller.start();
                          } else {
                              poller.set(options);
                              poller.restart();
                          }
  
                          return poller;
                      }
docs: Return a singleton instance of a poller. If poller does
  not exist, then register and start it. Otherwise return
  it and restart it if necessary.
  
  @param target
  @param options
  @returns {object}