@rimbu/stream@rimbu/stream/async-customAsyncReduceIterator<I,R>On this pageclass AsyncReduceIterator<I,R>undocumentedExtends: AsyncFastIteratorBase<T>Type parametersNameDescriptionIundocumentedRundocumentedPropertiesreducerundocumentedDefinitionreadonly reducer: AsyncReducer<I, R>;returnundocumentedDefinitionreturn?: () => Promise<any>;OverridesAsyncFastIteratorBase.returnsourceIteratorundocumentedDefinitionreadonly sourceIterator: AsyncFastIterator<I>;MethodsfastNextundocumentedDefinitionfastNext<O>(otherwise?: AsyncOptLazy<O>): Promise<R | O>;Type parametersNameDescriptionOParametersNameTypeDescriptionotherwiseAsyncOptLazy<O>OverridesAsyncFastIteratorBase.fastNextnextReturns a promise resolving to the next IteratorResult.Definitionnext(): Promise<IteratorResult<T>>;OverridesAsyncFastIterator.next, AsyncFastIteratorBase.next