Where is the “create_term” function?

Hey,

Little puzzled over this line and somethat follow it in the wp_insert_term function…

do_action(“create_term”, $term_id, $tt_id);

I need to customise create_term a little or maybe a lot but I cannot find it. Now I think I found a wp_create_term which one would assume is what I’m looking for but I then could not find how a connection is made between this do_action and that function.

Can someone shed some light on this please, thanks a lot.
Ryan