when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String appId,
    2. String faceId,
    3. String license,
    4. String nonce,
    5. String optimalDomain,
    6. String orderNo,
    7. String sign,
    8. String userId,
    9. @JsonKey.new(name: 'version') String apiVersion,
    )
)

A switch-like method, using callbacks.

As opposed to map, this offers destructuring. It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case Subclass2(:final field2):
    return ...;
}

Implementation

@optionalTypeArgs TResult when<TResult extends Object?>(TResult Function( String appId,  String faceId,  String license,  String nonce,  String optimalDomain,  String orderNo,  String sign,  String userId, @JsonKey(name: 'version')  String apiVersion)  $default,) {final _that = this;
switch (_that) {
case _FaceVerifyRequest():
return $default(_that.appId,_that.faceId,_that.license,_that.nonce,_that.optimalDomain,_that.orderNo,_that.sign,_that.userId,_that.apiVersion);case _:
  throw StateError('Unexpected subclass');

}
}