1-) FLUTTER - widget metot oluşturma

METOT

List<Widget>  sorunluContainer(){
  return  [
    Container(
      width: 75,
      height: 75,
      color: Colors.blue,
    ),
    Container(
      width: 75,
      height: 75,
      color: Colors.red,
    ),
    Container(
      width: 75,
      height: 75,
      color: Colors.black,
    ),
  ];
}

KULLANIMI

body: Container(
  child: Row(
  mainAxisAlignment: MainAxisAlignment.spaceBetween
  ,
     children: sorunluContainer()
  ),
),