{"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"hir::Node::ImplItem(hir::ImplItem"}]}
            hir::Node::ImplItem(hir::ImplItem { kind: hir::ImplItemKind::Type(ty), .. }) => ty.span,
            }) => ty.span,
            item => span_bug!(