Function gio_sys::g_desktop_app_info_get_string_list

pub unsafe extern "C" fn g_desktop_app_info_get_string_list(
    info: *mut GDesktopAppInfo, 
    key: *const c_char, 
    length: *mut size_t
) -> *mut *mut c_char

This is supported on crate feature v2_60 only.