title: Flutter TextField with currency format
body: <p>There's is some way to do a money format in a TextField to when the user going typing the value it going already formatting in real time?</p>
  
  <p><a href="https://i.stack.imgur.com/9It70.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/9It70.jpg" alt="formating while typing."></a></p>
  
  <p>Like in the above image, while the user is typing the format goes updating the value formatted already.</p>
  
  <p><strong>[UPDATE]</strong></p>
  
  <p>I just found this library that makes it works like a charm: 
  <a href="https://pub.dartlang.org/packages/flutter_masked_text" rel="noreferrer">https://pub.dartlang.org/packages/flutter_masked_text</a></p>