BorderRadiusDirectional.only constructor
const
BorderRadiusDirectional.only({})
Creates a border radius with only the given non-zero values. The other corners will be right angles.
Implementation
const BorderRadiusDirectional.only({
this.topStart = Radius.zero,
this.topEnd = Radius.zero,
this.bottomStart = Radius.zero,
this.bottomEnd = Radius.zero,
});