public static JSONObject of(String k1, Object v1, String k2, Object v2, String k3, Object v3) {
        JSONObject object = new JSONObject(3);
        object.put(k1, v1);
        object.put(k2, v2);
        object.put(k3, v3);
        return object;
    }
Pack three key-value pairs as {@link JSONObject}

<pre>
JSONObject jsonObject = JSONObject.of("key1", "value1", "key2", "value2", "key3", "value3");
</pre>

@param k1 first key
@param v1 first value
@param k2 second key
@param v2 second value
@param k3 third key
@param v3 third value
@since 2.0.2
core/src/main/java/com/alibaba/fastjson2/JSONObject.java