syntax_data: {"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"for_each_def(tcx,"}]}
source_snippet:     for_each_def(tcx, |ident, ns, def_id| match unique_symbols_rev.entry((ns, ident.name)) {
context_after:         IndexEntry::Occupied(mut v) => match v.get() {