>>>
foo() {
  final bar = [
    if (longVariableName == 'do nothing but be long') ...[] else if (longVariableName ==
        'show the welcome message')
      'Hello'
  ];
}
<<<
foo() {
  final bar = [
    if (longVariableName == 'do nothing but be long')
      ...[]
    else if (longVariableName == 'show the welcome message')
      'Hello'
  ];
}