syntax_data: {"ast_node_type":"function","tokens":[{"end":68,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:             fn visit_nested_item(&mut self, id: rustc_hir::ItemId) {
context_before:             #[instrument(level = "trace", skip(self))]
context_after:                 let id = id.owner_id.def_id;