syntax_data: {"ast_node_type":"other","tokens":[{"end":35,"kind":"keyword","start":0,"text":"hir::Node::Item(hir::Item"}]}
source_snippet:         hir::Node::Item(hir::Item {
context_before:     match tcx.hir_node_by_def_id(def_id) {
context_after:             kind: hir::ItemKind::Impl(hir::Impl { defaultness, of_trait: Some(_), .. }),