syntax_data: {"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"\"specify"}]}
source_snippet:         "specify the events recorded by the self profiler;
context_before:     self_profile_events: Option<Vec<String>> = (None, parse_opt_comma_list, [UNTRACKED],
context_after:         for example: `-Z self-profile-events=default,query-keys`