syntax_data: {"ast_node_type":"function","tokens":[{"end":54,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn visit_nested_body(&mut self, id: hir::BodyId) {
context_before: impl<'tcx> Visitor<'tcx> for NestedBodiesVisitor<'tcx> {
context_after:         let body_def_id = self.tcx.hir_body_owner_def_id(id);