{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"///"}]}
    /// Experimental pattern feature: after matching against a shared reference, do we limit the
impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
    /// default binding mode in subpatterns to be `ref` when it would otherwise be `ref mut`?