Function emscripten_sys::emscripten_async_wget2

pub unsafe extern fn emscripten_async_wget2(url: *const c_char,
                                            file: *const c_char,
                                            requesttype: *const c_char,
                                            param: *const c_char,
                                            arg: *mut c_void,
                                            onload: em_async_wget2_onload_func,
                                            onerror: em_async_wget2_onstatus_func,
                                            onprogress: em_async_wget2_onstatus_func)
                                            -> c_int