This is to track the regression introduced in master, which needs fixing for 0.14. See #9240, #9371, etc.
/**
 * Information about a mempool transaction.
 */
struct TxMempoolInfo
{
    
    CTransactionRef tx;
    
    int64_t nTime;
    
    CFeeRate feeRate;
    
    int64_t nFeeDelta;
};
/** Reason why a transaction was removed from the mempool,
 * this is passed to the notification signal.
 */
enum class MemPoolRemovalReason {