public com.google.cloud.workflows.v1.Workflow getWorkflow() {
      if (workflowBuilder_ == null) {
        return workflow_ == null
            ? com.google.cloud.workflows.v1.Workflow.getDefaultInstance()
            : workflow_;
      } else {
        return workflowBuilder_.getMessage();
      }
    }
<pre>
Required. Workflow to be updated.
</pre>

<code>
.google.cloud.workflows.v1.Workflow workflow = 1 [(.google.api.field_behavior) = REQUIRED];
</code>

@return The workflow.
java-workflows/proto-google-cloud-workflows-v1/src/main/java/com/google/cloud/workflows/v1/UpdateWorkflowRequest.java