BottomSheet Fragment access state

gistfile1.txt

override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
        val bottomSheet: BottomSheetDialog = super.onCreateDialog(savedInstanceState) as BottomSheetDialog
        bottomSheet.setOnShowListener { dialog ->
            val bottomSheetDialog: BottomSheetDialog? = dialog as? BottomSheetDialog
            val bottomSheetBehaviour = bottomSheetDialog?.findViewById(com.google.android.material.R.id.design_bottom_sheet) as? FrameLayout
            BottomSheetBehavior.from(bottomSheetBehaviour).setState(BottomSheetBehavior.STATE_EXPANDED)
        }
        return bottomSheet
    }