map<TResult extends Object?> method

  1. @optionalTypeArgs
TResult map<TResult extends Object?>({
  1. required TResult immediate(
    1. ImmediateCartSummaryItem value
    ),
  2. required TResult deferred(
    1. DeferredSummaryItem value
    ),
  3. required TResult recurring(
    1. RecurringCartSummaryItem value
    ),
})

A switch-like method, using callbacks.

Callbacks receives the raw object, upcasted. It is equivalent to doing:

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

Implementation

@optionalTypeArgs TResult map<TResult extends Object?>({required TResult Function( ImmediateCartSummaryItem value)  immediate,required TResult Function( DeferredSummaryItem value)  deferred,required TResult Function( RecurringCartSummaryItem value)  recurring,}){
final _that = this;
switch (_that) {
case ImmediateCartSummaryItem():
return immediate(_that);case DeferredSummaryItem():
return deferred(_that);case RecurringCartSummaryItem():
return recurring(_that);case _:
  throw StateError('Unexpected subclass');

}
}