{"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"Some(sp)"}]}
                                    Some(sp) => (sp.shrink_to_hi(), " ?Sized +"),
                                let (sp, sugg) = match param.colon_span {
                                    None => (param.span.shrink_to_hi(), ": ?Sized"),