I move my code into the new package folder, and met some problem. I build some different plugins(*.aar for android, *.framework for ios) for one function. Such as the Ad SDK or Analyzer SDK. I want to switch different SDK with the same purpose. What I do is encapsul the SDKs into my own plugin to provide the same interface, and change the plugin import setting before the unity build player. I put the plugins in the Assets folder in the old times. But in package it seems can not modify the import setting. Is there any way or API can change the plugin import setting before build a player?