How does Wireshark knows to byte swap the frame control of a IEEE80211

I have came across some capwap packets that seems to have two bytes of IEEE80211's frame control swapped.
Wireshark successfuly detects this and displays "Swapped" next to the frame control frame line.
I been looking through the code at epan/dissectors/packet-ieee80211.c to try to understand how does Wireshark know this but could not figure it out.

There seems to be a call to register_dissector dissect_ieee80211_bsfc but I could not understand when it is used over the other dissectors. (bsfc stands for byte-swapped frame control)

Please help me understand.