Function UnsafeSpan.Move
        
                Move
        
                (int startIndex, int toIndex, int count)
    
            
            Copy the range [startIndex,startIndex+count) to [toIndex,toIndex+count)
                Public
            
        void Move (
int  |     startIndex  |         |
int  |     toIndex  |         |
int  |     count  |         
Copy the range [startIndex,startIndex+count) to [toIndex,toIndex+count)