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
)