private com.google.protobuf.RepeatedFieldBuilderV3<
            com.google.rpc.Help.Link,
            com.google.rpc.Help.Link.Builder,
            com.google.rpc.Help.LinkOrBuilder>
        getHelpLinksFieldBuilder() {
      if (helpLinksBuilder_ == null) {
        helpLinksBuilder_ =
            new com.google.protobuf.RepeatedFieldBuilderV3<
                com.google.rpc.Help.Link,
                com.google.rpc.Help.Link.Builder,
                com.google.rpc.Help.LinkOrBuilder>(
                helpLinks_, ((bitField0_ & 0x00000008) != 0), getParentForChildren(), isClean());
        helpLinks_ = null;
      }
      return helpLinksBuilder_;
    }
<pre>
Output only. URL(s) pointing to additional information on handling the
current error.
</pre>

<code>
repeated .google.rpc.Help.Link help_links = 4 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/MigrationError.java