public static DropDownListBuilder Width(this DropDownListBuilder builder, int widthPixel)
{
var widgetBase =
(WidgetBase)builder.GetType()
.GetProperty("Component", BindingFlags.Instance | BindingFlags.NonPublic)
.GetValue(builder);
DictionaryExtensions.Merge(widgetBase.HtmlAttributes,
new { style = string.Format("width: {0}px;", widthPixel) });
return(builder);
}