code: func (lb *loadBalancer) getLoadBalancerIP(loadBalancerIP string) error {
  	if loadBalancerIP != "" {
  		return lb.getPublicIPAddress(loadBalancerIP)
  	}
  
  	return lb.associatePublicIPAddress()
  }
docs: // getLoadBalancerIP retieves an existing IP or associates a new IP.