whenOrNull<TResult extends Object?>  method 
      
  
TResult?
whenOrNull<TResult extends Object?>()
      
      
    
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( PublicKey publicKey,  int expiresAt)?  $default,) {final _that = this;
switch (_that) {
case _JWK() when $default != null:
return $default(_that.publicKey,_that.expiresAt);case _:
  return null;
}
}