Check if dragging or clicking a control during runtime

With UGUI I would normally do something like this:

Code (CSharp):

1. public static bool IsMouseOverUIObject ()
2. {
3.     if (EventSystem.current != null)
4.     {
5.         PointerEventData eventDataCurrentPosition = new PointerEventData (EventSystem.current)
6.         {
7.             position = new Vector2 (Input.mousePosition.x, Input.mousePosition.y)
8.         };
9.  
10.         List<RaycastResult> results = new List<RaycastResult> ();
11.         EventSystem.current.RaycastAll (eventDataCurrentPosition, results);
12.  
13.         return results.Count > 0;
14.     }
15.     else
16.     {
17.         Debug.LogError ("No EventSystem present to check for 'InputValidation.IsMouseOverUIObject ()'.");
18.         return false;
19.     }
20. }

To check if the mouse was above some interactable object so that when I dragged a slider, I could stop my camera from spinning.

How would I go about doing this with UIToolkit for runtime?