whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String elementType,
    2. bool empty,
    3. bool complete,
    4. StripeError? error,
    5. String brand,
    6. CardElementChangeEventValue? value,
    )?
)

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 elementType,  bool empty,  bool complete,  StripeError? error,  String brand,  CardElementChangeEventValue? value)?  $default,) {final _that = this;
switch (_that) {
case _CardElementChangeEvent() when $default != null:
return $default(_that.elementType,_that.empty,_that.complete,_that.error,_that.brand,_that.value);case _:
  return null;

}
}