whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String id,
    2. String label,
    3. String detail,
    4. num amount,
    )?
)

A variant of when that fallback to returning null

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return null;
}

Implementation

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? Function( String id,  String label,  String detail,  num amount)?  $default,) {final _that = this;
switch (_that) {
case _$ShippingOption() when $default != null:
return $default(_that.id,_that.label,_that.detail,_that.amount);case _:
  return null;

}
}