{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"Some(used_field)"}]}
                    Some(used_field) => (field.name, used_field.span, true),
                match used_fields.iter().find(|used_field| field.name == used_field.ident.name) {
                    None => (field.name, self.tcx.def_span(field.did), false),