Function gio_sys::g_mount_unmount_with_operation

pub unsafe extern "C" fn g_mount_unmount_with_operation(
    mount: *mut GMount, 
    flags: GMountUnmountFlags, 
    mount_operation: *mut GMountOperation, 
    cancellable: *mut GCancellable, 
    callback: GAsyncReadyCallback, 
    user_data: gpointer
)