langchain.js
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    Type Alias SingleReducer<ValueType, UpdateType>

    SingleReducer:
        | {
            default?: () => ValueType;
            reducer: BinaryOperator<ValueType, UpdateType>;
        }
        | {
            default?: () => ValueType;
            value: BinaryOperator<ValueType, UpdateType>;
        }
        | null

    Type Parameters

    Type Declaration