whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. bool? prioritizeIPv6,
    2. int? tryDelayMs,
    3. int? interleave,
    4. int? maxConcurrentTry,
    )?
)

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( bool? prioritizeIPv6,  int? tryDelayMs,  int? interleave,  int? maxConcurrentTry)?  $default,) {final _that = this;
switch (_that) {
case _HappyEyeballsConfig() when $default != null:
return $default(_that.prioritizeIPv6,_that.tryDelayMs,_that.interleave,_that.maxConcurrentTry);case _:
  return null;

}
}