BorderRadius.only constructor Null safety

const BorderRadius.only(
  1. {Radius? topLeft,
  2. Radius? topRight,
  3. Radius? bottomLeft,
  4. Radius? bottomRight}
)

Implementation

const factory BorderRadius.only({
  Radius? topLeft,
  Radius? topRight,
  Radius? bottomLeft,
  Radius? bottomRight,
}) = BorderRadiusOnly;