protected Custom2DFieldReference ConvertToRef(IEnumerable <StudReference> studReferences)
        {
            var fieldRef = new Custom2DFieldReference(studReferences.FirstOrDefault().ConnectionIndex);

            fieldRef.FieldIndices.AddRange(studReferences.Select(x => new Custom2DFieldIndex()
            {
                Index  = x.FieldIndex,
                Value2 = x.Value1,
                Value4 = x.Value2
            }));
            return(fieldRef);
        }
        protected Custom2DFieldReference ConvertToRef(StudReference studReference)
        {
            var fieldRef = new Custom2DFieldReference(studReference.ConnectionIndex);

            fieldRef.FieldIndices.Add(new Custom2DFieldIndex()
            {
                Index  = studReference.FieldIndex,
                Value2 = studReference.Value1,
                Value4 = studReference.Value2
            });
            return(fieldRef);
        }