Container 한번더 감싼 이유

 Container(
                      padding: EdgeInsets.fromLTRB(20, 10, 20, 10),
                      child: Container( **여기서 이렇게 container로 한번더 감싸준 이유가 뭔가요 굳이 안감싸도 잘 작동 되서요
                        child: Column(
                          children: <Widget>[
                            Icon(Icons.send),
                            Padding(padding: EdgeInsets.all(5)),
                            Text(
                              "공유",
                              style: TextStyle(
                                  fontSize: 11, color: Colors.white60),
                            )
                          ],
                        ),
                      ),
                   )
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