when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String topic,
    2. TransportType transportType,
    3. bool skipSubscribe
    )
)

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 topic,  TransportType transportType,  bool skipSubscribe)  $default,) {final _that = this;
switch (_that) {
case _SubscribeOptions():
return $default(_that.topic,_that.transportType,_that.skipSubscribe);}
}