{"ast_node_type":"variable","tokens":[{"end":48,"kind":"keyword","start":0,"text":"let"}]}
            let self_expr = ecx.expr_self(span);
                idents[1..].iter().map(|arg| ecx.expr_path(ecx.path_ident(span, *arg))).collect();
            ecx.expr_method_call(span, self_expr, primal, args)