whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(String chainId, String domain, String nonce, String uri, String address, String version, CacaoHeader? type, String? nbf, String? exp, String? statement, String? requestId, List<String>? resources, int? expiry, String? iat,)?)

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 chainId,  String domain,  String nonce,  String uri,  String address,  String version,  CacaoHeader? type,  String? nbf,  String? exp,  String? statement,  String? requestId,  List<String>? resources,  int? expiry,  String? iat)?  $default,) {final _that = this;
switch (_that) {
case _SIWECreateMessageArgs() when $default != null:
return $default(_that.chainId,_that.domain,_that.nonce,_that.uri,_that.address,_that.version,_that.type,_that.nbf,_that.exp,_that.statement,_that.requestId,_that.resources,_that.expiry,_that.iat);case _:
  return null;

}
}