What kinds of errors are set in failureReason for Dataform?

[sofisl]

The document below states "Output only. If and only if action's state is FAILED a failure reason is set."

https://cloud.google.com/php/docs/reference/cloud-dataform/latest/V1beta1.WorkflowInvocationAction

Probably the implementation location is below.

https://github.com/googleapis/google-cloud-java/blob/1d97e4db6d5106aad8fed2386151c457e0258de3/java-dataform/proto-google-cloud-dataform-v1beta1/src/main/java/com/google/cloud/dataform/v1beta1/WorkflowInvocationAction.java#L2422

It is difficult to read what kind of error is set from the source code, so please tell me the specific setting value.

see #5524

[sofisl]

FWIW, I think we currently can expect any string (not an enum): https://github.com/googleapis/google-cloud-node/blob/6deeeeda34ef933fba078769a8977095bef84f71/packages/google-cloud-dataform/protos/protos.d.ts#L8516