Function CGRectDivide 

pub unsafe extern "C-unwind" fn CGRectDivide(
    rect: CGRect,
    slice: NonNull<CGRect>,
    remainder: NonNull<CGRect>,
    amount: CGFloat,
    edge: CGRectEdge,
)

Available on crate feature CGGeometry only.

Safety

• slice must be a valid pointer.
• remainder must be a valid pointer.