@java.lang.Override
  public com.google.cloud.workflows.v1beta.WorkflowOrBuilder getWorkflowOrBuilder() {
    return workflow_ == null
        ? com.google.cloud.workflows.v1beta.Workflow.getDefaultInstance()
        : workflow_;
  }
<pre>
Required. Workflow to be updated.
</pre>

<code>
.google.cloud.workflows.v1beta.Workflow workflow = 1 [(.google.api.field_behavior) = REQUIRED];
</code>
java-workflows/proto-google-cloud-workflows-v1beta/src/main/java/com/google/cloud/workflows/v1beta/UpdateWorkflowRequest.java