docs: public boolean remove( C consumer ) {
          if (consumer != null) {
              // Iterate through the map to find the runner that owns this consumer ...
              ConsumerRunner match = null;
              for (ConsumerRunner runner : consumers) {
                  if (runner.getConsumer().equals(consumer)) {
                      match = runner;
                      break;
                  }
              }
              // Try to remove the matching runner (if we found one) from our list ...
              if (match != null) {
                  // Tell the thread to stop and wait for it, after which it will have been removed from our map ...
                  match.close();
                  return true;
              }
          }
          // We either didn't find it, or we found it but something else remove it while we searched ...
          return false;
      }