Send custom metadata to a live stream

[bypass112]

Hello, first of all thank you for creating this Flutter package!
I've seen that rtmp support metadata push, alongside the video publishing stream.
I've looked over the Haishinkit.kt and Haishinkit.swift and it seems that both can send metadata as per Adobe's documentation, using ns.send("@setDataFrame", "onMetaData", metaData);.
Is there an already implemented way to send / update custom metadata to a live stream that I am missing?
If there isn't what are the steps to implement a way to send rtmp metadata through Flutter?
Thank you!

[shogo4405]

I haven't made it available for use on the Flutter side. Also, on the native side, it seems that updates cannot be made with the current implementation. Sends it works ok.