presto-main/src/main/java/io/prestosql/transaction/InMemoryTransactionManager.java/InMemoryTransactionManager/getAllTransactionInfos
class InMemoryTransactionManager:    @Override
    public List<TransactionInfo> getAllTransactionInfos()
    {
        return transactions.values().stream()
                .map(TransactionMetadata::getTransactionInfo)
                .collect(toImmutableList());
    }