presto-main/src/main/java/io/prestosql/failuredetector/HeartbeatFailureDetector.java/HeartbeatFailureDetector/getLastFailureInfo
class HeartbeatFailureDetector:        @Nullable
        @JsonProperty
        public FailureInfo getLastFailureInfo()
        {
            Exception lastFailureException = getLastFailureException();
            if (lastFailureException == null) {
                return null;
            }
            return Failures.toFailure(lastFailureException).toFailureInfo();
        }