title: can't set border radius on one side and border on one side flutter
body: <p>Why this code hides the child of the container and how to solve this problem.
  I can't set border radius on one side and border on one side or two sides</p>
  <pre><code>Container(
            child: Text(
              &quot;Test&quot;,
              style: TextStyle(
                color: Theme.of(context).primaryColor,
                fontWeight: FontWeight.w800,
                fontFamily: &quot;GE&quot;,
                fontSize: 30.0,
              ),
            ),
            width: double.infinity,
            height: 100.0,
            padding: EdgeInsets.symmetric(vertical: 100.0, horizontal: 100.0),
            decoration: BoxDecoration(
              color: Colors.grey[800],
              borderRadius: const BorderRadius.only(
                bottomLeft: const Radius.circular(50.0),
              ),
              border: Border(
                top:
                    BorderSide(width: 16.0, color: Colors.lightBlue.shade600),
                bottom:
                    BorderSide(width: 16.0, color: Colors.lightBlue.shade900),
              ),
            ),
          )
  </code></pre>