--- a/util/stanza.lua	Thu May 20 14:00:54 2021 +0200
+++ b/util/stanza.lua	Sat May 08 16:31:48 2021 +0200
@@ -136,6 +136,10 @@
 	return self;
 end
 
+function stanza_mt:at_top()
+	return self.last_add == nil or #self.last_add == 0
+end
+
 function stanza_mt:reset()
 	self.last_add = nil;
 	return self;