whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(List<String> chains, String domain, String nonce, String aud, String type, String version, String iat, String? nbf, String? exp, String? statement, String? requestId, List<String>? resources,)?)

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( List<String> chains,  String domain,  String nonce,  String aud,  String type,  String version,  String iat,  String? nbf,  String? exp,  String? statement,  String? requestId,  List<String>? resources)?  $default,) {final _that = this;
switch (_that) {
case _SessionAuthPayload() when $default != null:
return $default(_that.chains,_that.domain,_that.nonce,_that.aud,_that.type,_that.version,_that.iat,_that.nbf,_that.exp,_that.statement,_that.requestId,_that.resources);case _:
  return null;

}
}