LegendMapping: Object
The LegendMapping property determines dictionary of connection of legends with data bindings.
Use JSON or the setLegendMapping method to set the property value and the getLegendMapping method to get the property value.
The property value is a JSON object which items are presented in following format: <legend identifier: identifier of data binding>.
The dictionary is used for data mapping of express report visualizers and legends.
The example of use is given in the page with description of the DataVisualizer.GlobalItemsIds property.