{"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"//"}]}
    // For a given path segment, if it's missing a turbofish, try to suggest adding
impl<'tcx> AnnotateUnitFallbackVisitor<'_, 'tcx> {
    // one so we can constrain an argument to `()`. To keep the suggestion simple,