pub unsafe extern "C" fn manifold_rect_union(
mem: *mut c_void,
a: *mut ManifoldRect,
b: *mut ManifoldRect,
) -> *mut ManifoldRect
pub unsafe extern "C" fn manifold_rect_union(
mem: *mut c_void,
a: *mut ManifoldRect,
b: *mut ManifoldRect,
) -> *mut ManifoldRect