public GdxChartExpressionVariable(
	GdxDataValue dataValue,
	string name,
	bool constant
)

Public Sub New ( _
	dataValue As GdxDataValue, _
	name As String, _
	constant As Boolean _
)

public function GdxChartExpressionVariable(
	dataValue : GdxDataValue, 
	name : String, 
	constant : boolean
)