Function xcb::ffi::xfixes::xcb_xfixes_set_region

pub unsafe extern "C" fn xcb_xfixes_set_region(
    c: *mut xcb_connection_t, 
    region: xcb_xfixes_region_t, 
    rectangles_len: u32, 
    rectangles: *const xcb_rectangle_t
) -> xcb_void_cookie_t