skinkie/SleekXMPP--XEP-0080- — comment on commit 9f607b64dc9b76059c481b97c52e7dd308ff60cd
File: sleekxmpp/plugins/xep_0080/stanza.py line 165
By legastero:

Since 'building' is marked as a sub interface, steps like this (default get/set) are done for you automatically. Unless you're overriding the default behaviour, you can safely omit these methods.