/// <summary>
/// Clear all selected entries from a list box. Supported onlywhen the select element supports multiple selection.
/// </summary>
/// <param name="selectLocator">The select locator.</param>
/// <param name="type">Type of locator.</param>
public void DeselectAll(string controlId, bool useSitemapId = true, FindType sourceType = FindType.ById)
{
string locator = useSitemapId == true?_siteMapData.GetLocator(controlId, out sourceType) : controlId;
_client.DeselectAll(locator, sourceType);
}