whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. bool? enabled,
    2. int? concurrency,
    3. int? xudpConcurrency,
    4. String? xudpProxyUDP443,
    )?
)

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? enabled,  int? concurrency,  int? xudpConcurrency,  String? xudpProxyUDP443)?  $default,) {final _that = this;
switch (_that) {
case _MuxConfig() when $default != null:
return $default(_that.enabled,_that.concurrency,_that.xudpConcurrency,_that.xudpProxyUDP443);case _:
  return null;

}
}