{"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"if"}]}
    if !len_fn.ret_type(ctx.sema.db).is_usize() {
    let len_fn = get_impl_method(ctx, &impl_, &Name::new_symbol_root(sym::len))?;
        cov_mark::hit!(len_fn_different_return_type);