Calculates target point where camera should move after drag. The method should be called after dragStart and before dragEnd.
dragStart
dragEnd
Returns the camera options object showing end point
The point to drag the map from, measured in \link MapOptions#size platform pixels \endlink from top to bottom and from left to right.
The point to drag the map to, measured in \link MapOptions#size platform pixels \endlink from top to bottom and from left to right.