public com.google.cloud.workflows.executions.v1beta.ExecutionOrBuilder getExecutionOrBuilder() {
      if (executionBuilder_ != null) {
        return executionBuilder_.getMessageOrBuilder();
      } else {
        return execution_ == null
            ? com.google.cloud.workflows.executions.v1beta.Execution.getDefaultInstance()
            : execution_;
      }
    }
<pre>
Required. Execution to be created.
</pre>

<code>
.google.cloud.workflows.executions.v1beta.Execution execution = 2 [(.google.api.field_behavior) = REQUIRED];
</code>
java-workflow-executions/proto-google-cloud-workflow-executions-v1beta/src/main/java/com/google/cloud/workflows/executions/v1beta/CreateExecutionRequest.java