public Builder mergeRewriteObject(
        com.google.cloud.storagebatchoperations.v1.RewriteObject value) {
      if (rewriteObjectBuilder_ == null) {
        if (transformationCase_ == 20
            && transformation_
                != com.google.cloud.storagebatchoperations.v1.RewriteObject.getDefaultInstance()) {
          transformation_ =
              com.google.cloud.storagebatchoperations.v1.RewriteObject.newBuilder(
                      (com.google.cloud.storagebatchoperations.v1.RewriteObject) transformation_)
                  .mergeFrom(value)
                  .buildPartial();
        } else {
          transformation_ = value;
        }
        onChanged();
      } else {
        if (transformationCase_ == 20) {
          rewriteObjectBuilder_.mergeFrom(value);
        } else {
          rewriteObjectBuilder_.setMessage(value);
        }
      }
      transformationCase_ = 20;
      return this;
    }
<pre>
Rewrite the object and updates metadata like KMS key.
</pre>

<code>.google.cloud.storagebatchoperations.v1.RewriteObject rewrite_object = 20;</code>
java-storagebatchoperations/proto-google-cloud-storagebatchoperations-v1/src/main/java/com/google/cloud/storagebatchoperations/v1/Job.java