title: Is there a way to create a text field with a prefix that is always visible in flutter
body: <p>I would like to create a text field with a prefix that is always visible. I am creating a phone field similar to the one used for WhatsApp phone number entry. I would like to have the country code as a persistent prefix.</p>
  
  <p>I have tried the prefix and prefixText options for InputDecoration, however, the prefixes are only visible when the textField is in focus. Any help offered on how to achieve this will be highly appreciated.</p>