title: what is FractionalTranslation in flutter?
body: <p>I am learning flutter for some time. But I do not seem to understand fully what is FractionalTranslation class despite docs and some examples.</p>
  <p>Documentation says: <code>FractionalTranslation</code> class applies a translation transformation before painting its child.</p>
  <p>But what does it mean? Could you explain it to me in more detail?</p>