public com.google.protobuf.ByteString getProductSetIdBytes() {
      java.lang.Object ref = productSetId_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        productSetId_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
The ProductSet that contains the Products to delete. If a Product is a
member of product_set_id in addition to other ProductSets, the Product will
still be deleted.
</pre>

<code>string product_set_id = 1;</code>

@return The bytes for productSetId.
java-vision/proto-google-cloud-vision-v1p4beta1/src/main/java/com/google/cloud/vision/v1p4beta1/ProductSetPurgeConfig.java