Method increment

packages/snapshot/src/port/utils.ts:271–276

(key: K)

  }

  increment(key: K): void {
    if (typeof this._total !== 'undefined') {
      this._total++
    }
    this.set(key, this.get(key) + 1)
  }

  total(): number {
    if (typeof this._total !== 'undefined') {