@java.lang.Override
    public final Builder mergeUnknownFields(
        final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.mergeUnknownFields(unknownFields);
    }
<pre>
Optional. The `next_page_token` value returned from a previous
[ListBackupCollections] request, if any.
</pre>

<code>string page_token = 3 [(.google.api.field_behavior) = OPTIONAL];</code>

@param value The bytes for pageToken to set.
@return This builder for chaining.
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/ListBackupsRequest.java