Function gio_sys::g_volume_eject_with_operation

pub unsafe extern "C" fn g_volume_eject_with_operation(
    volume: *mut GVolume, 
    flags: GMountUnmountFlags, 
    mount_operation: *mut GMountOperation, 
    cancellable: *mut GCancellable, 
    callback: GAsyncReadyCallback, 
    user_data: gpointer
)