The lowest x- and y-coordinates that appear in the grid.
- iOS 9.0+
- macOS 10.11+
- Mac Catalyst 13.0+
- tvOS 9.0+
You specify origin, width, and height when creating a grid graph with the
init initializer. After initialization, you can use this property to examine the parameters the graph was created with—for example, to draw the grid as a debugging overlay in your game UI.