public function addHost($host)
    {
        if (!isset($this->hosts[$host])) {
            $this->hosts[$host] = $host;
        }

        return $this;
    }
public function addHost($host)
    {
        if (!isset($this->hosts[$host])) {
            $this->hosts[$host] = $host;
        }

        return $this;
    }
public function addHost ( $ host ) { if ( ! isset ( $ this -> hosts [ $ host ] ) ) { $ this -> hosts [ $ host ] = $ host ; } return $ this ; }
Adding a host to the list.

@param string $host fully qualified name of the host object

@return self
Adding a host to the list .