Function gio_sys::g_file_measure_disk_usage_async

pub unsafe extern "C" fn g_file_measure_disk_usage_async(
    file: *mut GFile,
    flags: GFileMeasureFlags,
    io_priority: c_int,
    cancellable: *mut GCancellable,
    progress_callback: GFileMeasureProgressCallback,
    progress_data: gpointer,
    callback: GAsyncReadyCallback,
    user_data: gpointer
)