syntax_data: {"ast_node_type":"function","tokens":[{"end":81,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn valtree_to_pat(&self, cv: ValTree<'tcx>, ty: Ty<'tcx>) -> Box<Pat<'tcx>> {
context_before:     #[instrument(skip(self), level = "debug")]
context_after:         let span = self.span;