private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.storagebatchoperations.v1.RewriteObject,
            com.google.cloud.storagebatchoperations.v1.RewriteObject.Builder,
            com.google.cloud.storagebatchoperations.v1.RewriteObjectOrBuilder>
        getRewriteObjectFieldBuilder() {
      if (rewriteObjectBuilder_ == null) {
        if (!(transformationCase_ == 20)) {
          transformation_ =
              com.google.cloud.storagebatchoperations.v1.RewriteObject.getDefaultInstance();
        }
        rewriteObjectBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.storagebatchoperations.v1.RewriteObject,
                com.google.cloud.storagebatchoperations.v1.RewriteObject.Builder,
                com.google.cloud.storagebatchoperations.v1.RewriteObjectOrBuilder>(
                (com.google.cloud.storagebatchoperations.v1.RewriteObject) transformation_,
                getParentForChildren(),
                isClean());
        transformation_ = null;
      }
      transformationCase_ = 20;
      onChanged();
      return rewriteObjectBuilder_;
    }
<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