{"ast_node_type":"variable","tokens":[{"end":86,"kind":"keyword","start":0,"text":"let"}]}
                let ident = Ident::with_dummy_span(kw::SelfLower).with_span_pos(span);
            let self_arg = explicit_self.map(|explicit_self| {
                ast::Param::from_self(ast::AttrVec::default(), explicit_self, ident)