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https://developer.android.com/reference/android/support/v7/widget/RecyclerView.SmoothScroller.ScrollVectorProvider?authuser=002 RecyclerView.SmoothScroller.ScrollVectorProvider | API reference | Android Developers api reference recyclerview android developers https://developer.android.com/reference/kotlin/androidx/recyclerview/widget/RecyclerView.SmoothScroller.ScrollVectorProvider?authuser=2 RecyclerView.SmoothScroller.ScrollVectorProvider | API reference | Android Developers api reference recyclerview android developers