class TransactionNodeInformation {

    @Nonnull
    public Set<NodeID> getNodesByTransaction(@Nonnull final Keccak256 transactionHash) {
        Set<NodeID> result = nodesByTransaction.get(transactionHash);
        if (result == null) {
            result = new HashSet<>();
        }
        return Collections.unmodifiableSet(result);
    }

    public  TransactionNodeInformation(final int maxTransactions, final int maxPeers);
    public  TransactionNodeInformation();

}