How to make a variable containing multiple lines of CSS in LESS?

Question

css

How to implement a variable containing multiple lines in less like
this

/*
Переменная
*/
@transition: {
    -webkit-transition:  all 0.4s ease-in-out;
    transition:  all 0.4s ease-in-out;
};
/*
Подключение
*/
.main{
 @transition;
}
/*
Результат
*/
.main{
 -webkit-transition:  all 0.4s ease-in-out;
  transition:  all 0.4s ease-in-out;
}

Answer 1

Reading about mixins .
And then we read about autoprefixer and rethink our desire to use mixins for prefixes