whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String title,
    2. String? summary,
    3. String? description,
    4. String? termsOfService,
    5. Contact? contact,
    6. License? license,
    7. String version,
    )?
)

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 title,  String? summary,  String? description,  String? termsOfService,  Contact? contact,  License? license,  String version)?  $default,) {final _that = this;
switch (_that) {
case _Info() when $default != null:
return $default(_that.title,_that.summary,_that.description,_that.termsOfService,_that.contact,_that.license,_that.version);case _:
  return null;

}
}