my $im = PublicInbox::V2Writable->new($ibx, 1);
$im->{parallel} = 0;
ok($im->add($mime), 'message added');
-ok($im->remove($mime), 'message added');
+ok($im->remove($mime), 'message removed');
ok($im->add($mime), 'message added again');
$im->done;
my $msgs = $ibx->recent({limit => 1000});