off (event, listener) {
    const ret = super.off(event, listener)
    if (event === 'data' || event === 'readable') {
      this[kReading] = (
        this.listenerCount('data') > 0 ||
        this.listenerCount('readable') > 0
      )
    }
    return ret
  }
@param {string|symbol} event
@param {(...args: any[]) => void} listener
@returns {this}