code: func SetHealthcheckTimeoutStartup(timeout time.Duration) ClientOptionFunc {
  	return func(c *Client) error {
  		c.healthcheckTimeoutStartup = timeout
  		return nil
  	}
  }
docs: // SetHealthcheckTimeoutStartup sets the timeout for the initial health check.
  // The default timeout is 5 seconds (see DefaultHealthcheckTimeoutStartup).
  // Notice that timeouts for subsequent health checks can be modified with
  // SetHealthcheckTimeout.