syntax_data: {"ast_node_type":"other","tokens":[{"end":94,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// keep this in sync with the event filter names in librustc_data_structures/profiling.rs
context_before:     ),
context_after:     self_profile_events: Option<Vec<String>> = (None, parse_opt_comma_list, [UNTRACKED],