Function soup_sys::soup_multipart_input_stream_next_part_async

pub unsafe extern "C" fn soup_multipart_input_stream_next_part_async(
    multipart: *mut SoupMultipartInputStream, 
    io_priority: c_int, 
    cancellable: *mut GCancellable, 
    callback: GAsyncReadyCallback, 
    data: gpointer
)