@rimbu/stream@rimbu/stream/customReducerFastIterator<T,R>On this pageclass ReducerFastIterator<T,R>undocumentedExtends: FastIteratorBase<T>Type parametersNameDescriptionTundocumentedRundocumentedPropertiesreducerInstanceundocumentedDefinitionreadonly reducerInstance: Reducer.Instance<T, R>;sourceIteratorundocumentedDefinitionreadonly sourceIterator: FastIterator<T>;MethodsfastNextundocumentedDefinitionfastNext<O>(otherwise?: OptLazy<O>): R | O;Type parametersNameDescriptionOParametersNameTypeDescriptionotherwiseOptLazy<O>OverridesFastIteratorBase.fastNextnextReturns the next IteratorResult.Definitionnext(): IteratorResult<T>;OverridesFastIterator.next, FastIteratorBase.next