System.Xml.Xsl.XsltOld.CompiledAction.PrecalculateAvt C# (CSharp) Method

        internal static string PrecalculateAvt(ref Avt avt) {
            string result = null;
            if(avt != null && avt.IsConstant) {
                result = avt.Evaluate(null, null);
                avt = null;
            }
            return result;
        }