Public MustOverride Sub reserveAdditionalVolume ( _
	charging As Charging, _
	volume As Long, _
	billingText As String, _
	username As String, _
	password As String _
)

public abstract void reserveAdditionalVolume (
	Charging charging,
	long volume,
	string billingText,
	string username,
	string password
)

public:
virtual void reserveAdditionalVolume (
	Charging^ charging, 
	long long volume, 
	String^ billingText, 
	String^ username, 
	String^ password
) abstract