{"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"//"}]}
    // We have information about whether `use` (import) items are actually
impl<'a, 'ra, 'tcx> UnusedImportCheckVisitor<'a, 'ra, 'tcx> {
    // used now. If an import is not used at all, we signal a lint error.