is mentioned by

Thm* u:Term, d:Decl, tr:trace_env(d), a:(d), e,s,v:Top. affects_trace(tr.proj;kind(a);u) ([[u]] e s v tappend(tr;a) ~ [[u]] e s v tr)

[term_mng_tappend]

In prior sections: mb events

Try larger context: GenAutomata