docs: public boolean removeOnTransactionBroadcastListener(OnTransactionBroadcastListener listener) {
          boolean result = ListenerRegistration.removeFromList(listener, peersTransactionBroadastEventListeners);
          for (Peer peer : getConnectedPeers())
              peer.removeOnTransactionBroadcastListener(listener);
          for (Peer peer : getPendingPeers())
              peer.removeOnTransactionBroadcastListener(listener);
          return result;
      }