How to add custom_metadata when artifacts are created through savefileasartifactplugin

[subbu4github]

I am in google adk 1.30 version. I want to know how to get the custom_metadata added to the artifact when created through savefileasartifactplugin. Is there a way to get it updated afterwards in any of the callbacks? Also let me know how to retrieve them if I am able to create custom metadata.

Thanks.

[boyangsvl]

I'd recommend you subclass the plugin and add your own logic.