syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// computing it may negatively impact performance.
context_before:     /// lead to false overflow results (#47139) and because always
context_after:     intercrate_ambiguity_causes: Option<FxIndexSet<IntercrateAmbiguityCause<'tcx>>>,