Image_Graph_DataPreprocessor | --Image_Graph_DataPreprocessor_Formatted | --Image_Graph_DataPreprocessor_Currency
Uses the {@see Image_Graph_DataPreprocessor_Formatted} to represent the values as a currency, i.e. 10 => € 10.00
Image_Graph_DataPreprocessor_Currency &Image_Graph_DataPreprocessor_Currency( string $currencySymbol)