### Question:
Json { public static JsonObjectBuilder object() { return new JsonObjectBuilder(false); } private  Json(); static JsonArrayBuilder array(); static JsonArrayBuilder array(boolean ignoreEmptyBuilders); static JsonObjectBuilder object(); static JsonObjectBuilder object(boolean ignoreEmptyBuilders);  }### Answer:
@Test public void testEscaping() { assertEquals("{\"foo\":\"bar=\\\"baz\\u000a and \\u0009 F\\\"\"}", Json.object().put("foo", "bar=\"baz\n and \t F\"").build()); }