public static Select select(String fieldName) { return new Select(fieldName);
    }
@Test
    void sub_expression_annotations() {
        String q = Q.select("*")
                .from("sd1")
                .where("f1").contains("v1").annotate(A.a("ak1", "av1"))
                .build();

        assertEquals(q, "yql=select * from sd1 where ([{\"ak1\":\"av1\"}](f1 contains \"v1\"))");
    }