private static void SetTextStyles(SvgWriter writer, Config.Layer layerConfig)
 {
     if (layerConfig != null)
     {
         SetTextStyles(writer, layerConfig.TextStyle);
     }
     else
     {
         SetTextStyles(writer, new TextStyle());
     }
 }
 private static string GetLabel(Config.Layer layerConfig, IFeature feature)
 {
     return(layerConfig == null ? null : layerConfig.LabelStyle == null ? null : string.Format(layerConfig.LabelStyle.Format, layerConfig.LabelStyle.PropertyNames.Select(x => feature[x]).ToArray()));
 }