pub unsafe extern "C" fn cairo_scaled_font_set_user_data(
scaled_font: *mut cairo_scaled_font_t,
key: *const cairo_user_data_key_t,
user_data: *mut c_void,
destroy: cairo_destroy_func_t,
) -> cairo_status_t
pub unsafe extern "C" fn cairo_scaled_font_set_user_data(
scaled_font: *mut cairo_scaled_font_t,
key: *const cairo_user_data_key_t,
user_data: *mut c_void,
destroy: cairo_destroy_func_t,
) -> cairo_status_t