code: public function setBalancingMode($haipName, $balancingMode, $cookieName = '')
      {
          return $this->call(self::SERVICE, 'setBalancingMode', [$haipName, $balancingMode, $cookieName]);
      }
docs: Sets the provided balancing mode for the HA-IP.
  
  The cookie name is expected to be an empty string unless the balancing mode is set to 'cookie'.
  
  HA-IP Pro feature.
  
  @param string $haipName      The HA-IP name
  @param string $balancingMode ('roundrobin', 'cookie', 'source')
  @param string $cookieName    The cookie name that pins the session if the balancing mode is 'cookie'
  
  @throws \SoapFault
  
  @return mixed