Android Kotlin: Explicit @Metadata is disallowed

Question

I have the next java class I use to reduce drag sensitivity in a pager:

@Metadata(
        mv = {1, 6, 0},
        k = 1,
        d1 = {"\u0000\u001c\n\u0002\u0018\u0002\n\u0002\u0010\u0000\n\u0002\b\u0002\n\u0002\u0010\u0002\n\u0002\u0018\u0002\n\u0000\n\u0002\u0010\b\n\u0000\u0018\u00002\u00020\u0001B\u0005¢\u0006\u0002\u0010\u0002J\u0014\u0010\u0003\u001a\u00020\u0004*\u00020\u00052\b\b\u0002\u0010\u0006\u001a\u00020\u0007¨\u0006\b"},
        d2 = {"Lcom/testmepracticetool/toeflsatactexamprep/ui/activities/main/KTest;", "", "()V", "reduceDragSensitivity", "", "Landroidx/viewpager2/widget/ViewPager2;", "f", "", "android_testme.app"}
)
public final class ViewPagerSensitivity {
    public static void reduceDragSensitivity(@NotNull ViewPager2 $this$reduceDragSensitivity, int f) throws NoSuchFieldException, IllegalAccessException {
        Intrinsics.checkNotNullParameter($this$reduceDragSensitivity, "$this$reduceDragSensitivity");
        Field recyclerViewField = ViewPager2.class.getDeclaredField("mRecyclerView");
        Intrinsics.checkNotNullExpressionValue(recyclerViewField, "recyclerViewField");
        recyclerViewField.setAccessible(true);
        Object var10000 = recyclerViewField.get($this$reduceDragSensitivity);
        if (var10000 == null) {
            throw new NullPointerException("null cannot be cast to non-null type androidx.recyclerview.widget.RecyclerView");
        } else {
            RecyclerView recyclerView = (RecyclerView)var10000;
            Field touchSlopField = RecyclerView.class.getDeclaredField("mTouchSlop");
            Intrinsics.checkNotNullExpressionValue(touchSlopField, "touchSlopField");
            touchSlopField.setAccessible(true);
            var10000 = touchSlopField.get(recyclerView);
            if (var10000 == null) {
                throw new NullPointerException("null cannot be cast to non-null type kotlin.Int");
            } else {
                int touchSlop = (Integer)var10000;
                touchSlopField.set(recyclerView, touchSlop * f);
            }
        }
    }
}

After Kotlin migration with Android Studio the class ended like this:

@Metadata(
    mv = [1, 6, 0],
    k = 1,
    d1 = ["\u0000\u001c\n\u0002\u0018\u0002\n\u0002\u0010\u0000\n\u0002\b\u0002\n\u0002\u0010\u0002\n\u0002\u0018\u0002\n\u0000\n\u0002\u0010\b\n\u0000\u0018\u00002\u00020\u0001B\u0005¢\u0006\u0002\u0010\u0002J\u0014\u0010\u0003\u001a\u00020\u0004*\u00020\u00052\b\b\u0002\u0010\u0006\u001a\u00020\u0007¨\u0006\b"],
    d2 = ["Lcom/xxx/xxx/ui/activities/main/KTest;", "", "()V", "reduceDragSensitivity", "", "Landroidx/viewpager2/widget/ViewPager2;", "f", "", "android_xxx.app"]
)
object ViewPagerSensitivity {
    @Throws(NoSuchFieldException::class, IllegalAccessException::class)
    fun reduceDragSensitivity(`$this$reduceDragSensitivity`: ViewPager2, f: Int) {
        Intrinsics.checkNotNullParameter(
            `$this$reduceDragSensitivity`,
            "\$this\$reduceDragSensitivity"
        )
        val recyclerViewField = ViewPager2::class.java.getDeclaredField("mRecyclerView")
        Intrinsics.checkNotNullExpressionValue(recyclerViewField, "recyclerViewField")
        recyclerViewField.isAccessible = true
        var var10000 = recyclerViewField[`$this$reduceDragSensitivity`]
        if (var10000 == null) {
            throw NullPointerException("null cannot be cast to non-null type androidx.recyclerview.widget.RecyclerView")
        } else {
            val recyclerView = var10000 as RecyclerView
            val touchSlopField = RecyclerView::class.java.getDeclaredField("mTouchSlop")
            Intrinsics.checkNotNullExpressionValue(touchSlopField, "touchSlopField")
            touchSlopField.isAccessible = true
            var10000 = touchSlopField[recyclerView]
            if (var10000 == null) {
                throw NullPointerException("null cannot be cast to non-null type kotlin.Int")
            } else {
                val touchSlop = var10000 as Int
                touchSlopField[recyclerView] = touchSlop * f
            }
        }
    }
}

but

What shall I do to correctly convert this class to Kotlin?

Edit 1:

I can't say what is that Metadata tag for exactly, as this is a class I've downloaded from the Internet, maybe I can just remove it, not sure. Haven't tested it yet because I'm in the process of migrating my app to Kotlin.

Answer 1

Ok, this is not exactly an answer, but the closest to it. I've commented the @Metadata tag and the app is working fine and the pager is less sensitive, which makes me think that Metadata is useless.