public static Builder newBuilder() {
      return DEFAULT_INSTANCE.toBuilder();
    }
<pre>
Required. The URL that points to the file that stores the object list
entries. This file must allow public access. The URL is either an
HTTP/HTTPS address (e.g. `https://example.com/urllist.tsv`) or a Cloud
Storage path (e.g. `gs://my-bucket/urllist.tsv`).
</pre>

<code>string list_url = 1 [(.google.api.field_behavior) = REQUIRED];</code>

@return The bytes for listUrl.
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java