createCGRect function
Helper to create CGRect.
Implementation
objc.CGRect createCGRect(double x, double y, double width, double height) {
final ptr = calloc<objc.CGRect>();
ptr.ref.origin.x = x;
ptr.ref.origin.y = y;
ptr.ref.size.width = width;
ptr.ref.size.height = height;
return ptr.ref;
}