VelocityTracker() has a fix with positional arguments

@@ -300,7 +300,17 @@ class _ModalBottomSheetState extends State<ModalBottomSheet>
 
 
 // Otherwise the calculate the velocity with a VelocityTracker
 // Otherwise the calculate the velocity with a VelocityTracker
       if (_velocityTracker == null) {
       if (_velocityTracker == null) {
-        _velocityTracker = VelocityTracker();
+        // Checking the device type as per the OS installed in it
+        // SmartPhone Devices
+        if (Platform.isAndroid || Platform.isIOS) {
+          _velocityTracker = VelocityTracker(PointerDeviceKind.touch);
+        }
+        // PCs or desktops or Laptops devices has mouse pointers
+        else if (Platform.isLinux || Platform.isWindows || Platform.isMacOS) {
+          _velocityTracker = VelocityTracker(PointerDeviceKind.mouse);
+        } else {
+          _velocityTracker = VelocityTracker(PointerDeviceKind.unknown);
+        }
         _startTime = DateTime.now();
         _startTime = DateTime.now();
       }
       }
       DragUpdateDetails dragDetails;
       DragUpdateDetails dragDetails;