public int clampViewPositionHorizontal(View child, int left, int dx) {
            return 0;
        }
Restrict the motion of the dragged child view along the horizontal axis.
The default implementation does not allow horizontal motion; the extending
class must override this method and provide the desired clamping.


@param child Child view being dragged
@param left Attempted motion along the X axis
@param dx Proposed change in position for left
@return The new clamped position for left
app/src/main/java/home/smart/fly/animations/widget/slidepanel/ViewDragHelper.java