syntax_data: {"ast_node_type":"function","tokens":[{"end":50,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn collect_taits_declared_in_body(&mut self) {
context_before:     #[instrument(level = "trace", skip(self))]
context_after:         let body = self.tcx.hir_body_owned_by(self.item).value;