mlx-bun library API
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    interface MlxGroupedMethod {
        runningTokens?: number;
        advance(work?: MlxForwardWork): Promise<void>;
        dispose(): void;
        filterRows(keep: readonly number[], discard: boolean): void;
        prepare(row: Row): MlxGroupPreparation;
    }
    Index
    runningTokens?: number

    Maximum target tokens in the next iteration, including candidates.