{"ast_node_type":"variable","tokens":[{"end":72,"kind":"keyword","start":0,"text":"let"}]}
                        let crate_root = self.resolve_crate_root(ident);
                        // `::a::b` from 2015 macro on 2018 global edition
                        module = Some(ModuleOrUniformRoot::ModuleAndExternPrelude(crate_root));