Sets style source parameters. This method can be used to perform batch update for a style source parameters. The structure of a provided parameters value must conform to \sa https://docs.mapbox.com/mapbox-gl-js/style-spec/sources/ format for a corresponding source type. Modification of a source type https://docs.mapbox.com/mapbox-gl-js/style-spec/sources/#type is not allowed.
Return
A string describing an error if the operation was not successful, empty otherwise.