whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. Name? firstName,
    2. Name? lastName,
    3. String? dateOfBirth,
    4. Gender? gender,
    )?
)

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(@JsonKey(name: 'firstName')  Name? firstName, @JsonKey(name: 'lastName')  Name? lastName, @JsonKey(name: 'dateOfBirth')  String? dateOfBirth, @JsonKey(name: 'gender', unknownEnumValue: Gender.unknown)  Gender? gender)?  $default,) {final _that = this;
switch (_that) {
case _BioData() when $default != null:
return $default(_that.firstName,_that.lastName,_that.dateOfBirth,_that.gender);case _:
  return null;

}
}