@java.lang.Override
  public Builder toBuilder() {
    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
  }
<pre>
Optional. the order by fields for the result.
</pre>

<code>string order_by = 5 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The bytes for orderBy.
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/ListTargetProjectsRequest.java