Drag and Drop files to Juce component (iOS, AUv3)

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Hi there. I’m looking for a way to implement native iOS file picker that allows drag and drop and a way to make a target out of Juce component. Take a look at this video please to get the idea: youtube link

I know I should deal with Obj-C native classes (which is going to be hard as I haven’t touched it for few years) and I’m wondering has this question been explored by anyone. Any advices on where to look in UI classes (both iOS and Juce) or general suggestions are welcome.