pub unsafe extern "C" fn g_boxed_type_register_static(
name: *const c_char,
boxed_copy: GBoxedCopyFunc,
boxed_free: GBoxedFreeFunc,
) -> GType
pub unsafe extern "C" fn g_boxed_type_register_static(
name: *const c_char,
boxed_copy: GBoxedCopyFunc,
boxed_free: GBoxedFreeFunc,
) -> GType