How to handle AssetManager using JavaCpp?

I have a c++ library that needs access to the java Android AssetManager. (android.content.res.AssetManager) To pass it to the library, I am using a custom JNI that takes this AssetManager as a jobect and then converts it to the equivalent c++ class AAssetManager (defines in android/asset_manager.h) using AAssetManager_fromJava(jobject*)

I was wondering how to handle this using javacpp?

I tried to do infoMap.put(new Info("AAssetManager").javaNames("AssetManager").define()) but the generated NativeLibrary.java doesn't define the AssetManager class.