How can i read ArrayList from FireStore?

If I have full ArrayList in my FirebaseFireStore , how can i read it to local arraylist , I mean what function should use?
** public void stuArr() {

    noteRef.get()
            .addOnSuccessListener(new OnSuccessListener<DocumentSnapshot>() {
                @Override

                public void onSuccess(DocumentSnapshot documentSnapshot) {
                    if (documentSnapshot.exists()) {

                        studentArrayList.add(documentSnapshot.getString("studentArrayList"));

                    }

                }
            })
            .addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {
                    Toast.makeText(getActivity() , "Error!", Toast.LENGTH_SHORT).show();
                    Log.d("TAG", e.toString());
                }
            });
}

**

Source: Android Studio Questions

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