/// <summary>
/// Gets non visual drawing properties values (cNvPr).
/// </summary>
/// <returns>(identifier, hidden, name)</returns>
public static (int, bool, string) GetNvPrValues(this OpenXmlCompositeElement compositeElement)
{
// .First() is used instead .Single() because group shape can have more than one id for its child elements
var cNvPr = compositeElement.GetNonVisualDrawingProperties();
var id = (int)cNvPr.Id.Value;
var name = cNvPr.Name.Value;
var parsedHiddenValue = cNvPr.Hidden?.Value;
var hidden = parsedHiddenValue != null && parsedHiddenValue == true;
return(id, hidden, name);
}