Set POJO for Gson when JSON key has a dash
<p>The JSON string is:</p>

<pre><code>{
    "translation": ["some words"],
    "basic": {
        "us-phonetic": "'flæbɚɡæstɪd",
        "phonetic": "'flæbɚɡæstɪd",
        "uk-phonetic": "'flæbəga:stid",
        "explains": ["v. some words",
            "adj. some words"
        ]
    }
}
</code></pre>

<p>But Java can not have a value with a <code>"-"</code> in it. So how to get <code>"us-phonetic"</code>?</p>