private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.workflows.v1.Workflow.StateError,
            com.google.cloud.workflows.v1.Workflow.StateError.Builder,
            com.google.cloud.workflows.v1.Workflow.StateErrorOrBuilder>
        getStateErrorFieldBuilder() {
      if (stateErrorBuilder_ == null) {
        stateErrorBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.workflows.v1.Workflow.StateError,
                com.google.cloud.workflows.v1.Workflow.StateError.Builder,
                com.google.cloud.workflows.v1.Workflow.StateErrorOrBuilder>(
                getStateError(), getParentForChildren(), isClean());
        stateError_ = null;
      }
      return stateErrorBuilder_;
    }
<pre>
Output only. Error regarding the state of the workflow. For example, this
field will have error details if the execution data is unavailable due to
revoked KMS key permissions.
</pre>

<code>
.google.cloud.workflows.v1.Workflow.StateError state_error = 12 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-workflows/proto-google-cloud-workflows-v1/src/main/java/com/google/cloud/workflows/v1/Workflow.java