code: func (c *Adb) ServerVersion() (int, error) {
  	resp, err := roundTripSingleResponse(c.server, "host:version")
  	if err != nil {
  		return 0, wrapClientError(err, c, "GetServerVersion")
  	}
  
  	version, err := c.parseServerVersion(resp)
  	if err != nil {
  		return 0, wrapClientError(err, c, "GetServerVersion")
  	}
  	return version, nil
  }
docs: // ServerVersion asks the ADB server for its internal version number.