title: Flutter BDD/Test_Driver - Appending text?
body: <p>I'm quite new to Flutter and have been using Test_Driver to automate my feature files.</p>
  <p>I want to test appending text to an existing text field with content in it using:</p>
  <pre><code>await FlutterDriverUtils.enterText(world.driver, field, textToEnter);
  </code></pre>
  <p>However, this seems to replace the current text with textToEnter</p>
  <p>Is it possible to append?</p>
  <p>Thank you,</p>