text: export function zincrby(key, increment, value) {
    if (!this.data.has(key)) {
      this.data.set(key, new Map())
    }
  
    const map = this.data.get(key)
    let score = 0
    if (map.has(value)) {
      ;({ score } = map.get(value))
    }
  
    score += parseFloat(increment)
    map.set(value, { value, score })
  
    this.data.set(key, map)
    return score.toString()
  }
  