code: public Collection<ProposalResponse> sendTransactionProposal(TransactionProposalRequest transactionProposalRequest, Collection<Peer> peers) throws ProposalException, InvalidArgumentException {
  
          return sendProposal(transactionProposalRequest, peers);
      }
docs: Send a transaction proposal to specific peers.
  
  @param transactionProposalRequest The transaction proposal to be sent to the peers.
  @param peers
  @return responses from peers.
  @throws InvalidArgumentException
  @throws ProposalException