@java.lang.Override
  public com.google.cloud.workflows.v1.ExecutionHistoryLevel getExecutionHistoryLevel() {
    com.google.cloud.workflows.v1.ExecutionHistoryLevel result =
        com.google.cloud.workflows.v1.ExecutionHistoryLevel.forNumber(executionHistoryLevel_);
    return result == null
        ? com.google.cloud.workflows.v1.ExecutionHistoryLevel.UNRECOGNIZED
        : result;
  }
<pre>
Optional. Describes the execution history level to apply to this workflow.
</pre>

<code>
.google.cloud.workflows.v1.ExecutionHistoryLevel execution_history_level = 15 [(.google.api.field_behavior) = OPTIONAL];
</code>

@return The executionHistoryLevel.
java-workflows/proto-google-cloud-workflows-v1/src/main/java/com/google/cloud/workflows/v1/Workflow.java