Function reduce

packages/reactivity/src/arrayInstrumentations.ts:167–177

(
    fn: (
      acc: unknown,
      item: unknown,
      index: number,
      array: unknown[],
    ) => unknown,
    ...args: unknown[]
  )

  },

  reduce(
    fn: (
      acc: unknown,
      item: unknown,
      index: number,
      array: unknown[],
    ) => unknown,
    ...args: unknown[]
  ) {
    return reduce(this, 'reduce', fn, args)
  },

  reduceRight(
    fn: (