Responsive Values
Use BreakifyValue to define a value per breakpoint. Missing values inherit the nearest previous value:
const columns = BreakifyValue( sm: 1, md: 2, lg: 4,);
final value = context.resolve(columns);BreakifyValue is generic and can resolve values such as int, double and EdgeInsets. For smooth transitions, use BreakifyFluidValue; it linearly interpolates between defined breakpoint values.

