code: func GetVendorClass(o dhcp6.Options) (*VendorClass, error) {
  	v, err := o.GetOne(dhcp6.OptionVendorClass)
  	if err != nil {
  		return nil, err
  	}
  
  	vc := new(VendorClass)
  	err = vc.UnmarshalBinary(v)
  	return vc, err
  }
docs: // GetVendorClass returns the Vendor Class Option value, described in RFC 3315,
  // Section 22.16.
  //
  // The VendorClass structure returned contains VendorClass in
  // the option.