Merge a list of rectangles into a single rectangle. If there are no rectangles to merge, then null is returned. Note that, if a single rectangle is supplied, that same rectangle is returned without copying.
Returns the merged rectangle, or null if there are no input rectangles
Merge a list of rectangles into a single rectangle. If there are no rectangles to merge, then null is returned. Note that, if a single rectangle is supplied, that same rectangle is returned without copying.