@java.lang.Override
  public com.google.protobuf.DurationOrBuilder getDurationOrBuilder() {
    return duration_ == null ? com.google.protobuf.Duration.getDefaultInstance() : duration_;
  }
<pre>
Output only. Measures the duration of the execution.
</pre>

<code>.google.protobuf.Duration duration = 12 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-workflow-executions/proto-google-cloud-workflow-executions-v1/src/main/java/com/google/cloud/workflows/executions/v1/Execution.java