code: function(didMouseMove) {
              // Update the draggee's virtual midpoint
              this.draggeeVirtualMidpointX = this.mouseX - this.mouseOffsetX + (this.targetItemWidth / 2);
              this.draggeeVirtualMidpointY = this.mouseY - this.mouseOffsetY + (this.targetItemHeight / 2);
  
              this.base(didMouseMove);
          }
docs: Drag