@java.lang.Override
    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(bucket_)) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 1, bucket_);
      }
      if (objectConfigurationCase_ == 2) {
        output.writeMessage(
            2, (com.google.cloud.storagebatchoperations.v1.PrefixList) objectConfiguration_);
      }
      if (objectConfigurationCase_ == 3) {
        output.writeMessage(
            3, (com.google.cloud.storagebatchoperations.v1.Manifest) objectConfiguration_);
      }
      getUnknownFields().writeTo(output);
    }
<pre>
Specifies objects in a manifest file.
</pre>

<code>.google.cloud.storagebatchoperations.v1.Manifest manifest = 3;</code>
java-storagebatchoperations/proto-google-cloud-storagebatchoperations-v1/src/main/java/com/google/cloud/storagebatchoperations/v1/BucketList.java