title: A borderRadius can only be given for uniform borders
body: <p>I am getting a warning when using following code but my app is running fine:</p>
  
  <pre><code>════════ Exception caught by rendering library ═════════════════════════════════════════════════════
  The following assertion was thrown during paint():
  A borderRadius can only be given for uniform borders.
  'package:flutter/src/painting/box_border.dart':
  Failed assertion: line 510 pos 12: 'borderRadius == null'
  </code></pre>
  
  <p>Here is my code: </p>
  
  <pre><code>           Container(
                height: screenSize.height*.13,
                width: AppSize.medium,
                decoration: BoxDecoration(
                  color: Colors.red,
                  border: Border(
                    right: BorderSide(
                      width: 1.0,
                      color: Colors.blue
                    ),
                  ),
                  borderRadius: BorderRadius.only(
                    topRight: Radius.circular(AppSize.small),
                    bottomRight: Radius.circular(AppSize.small),
                  )
                ),
              )
  </code></pre>