whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String topic,
    2. int expiry,
    3. Relay relay,
    4. bool active,
    5. List<String>? methods,
    6. PairingMetadata? peerMetadata,
    )?
)

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 topic,  int expiry,  Relay relay,  bool active,  List<String>? methods,  PairingMetadata? peerMetadata)?  $default,) {final _that = this;
switch (_that) {
case _PairingInfo() when $default != null:
return $default(_that.topic,_that.expiry,_that.relay,_that.active,_that.methods,_that.peerMetadata);case _:
  return null;

}
}