whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String id,
    2. String account,
    3. PayAmount amount,
    4. int etaSeconds,
    5. List<Action> actions,
    )?
)

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 account,  PayAmount amount, @JsonKey(name: 'etaS')  int etaSeconds,  List<Action> actions)?  $default,) {final _that = this;
switch (_that) {
case _PaymentOption() when $default != null:
return $default(_that.id,_that.account,_that.amount,_that.etaSeconds,_that.actions);case _:
  return null;

}
}