Appearance
function Rect.isOrigin(rect: Rect): boolean
Checks if a rectangle is the origin rectangle (positioned at 0,0 with zero width and height).
Rect.isOrigin({ left: 0, top: 0, width: 0, height: 0 }); // true
pipe({ left: 0, top: 0, width: 0, height: 0 }, Rect.isOrigin()); // true