How I can clip new files in basket into an existing document in cabinet using platform API?

in this code can document ids be the basket document ids 
 

public static Document MergeDocumentsBasket(FileCabinet basket, List<int> docIds)
        {
            Document mergedDocument = basket.PutToContentMergeOperationRelationForDocument
                (
                    new ContentMergeOperationInfo()
                    {
                        Documents = docIds,
                        Operation = ContentMergeOperation.Staple,
                        Force = true
                    }
                );
            return mergedDocument;
        }

Dear Ahmad Abu Arja! It looks like the Community cannot answer your question. That's why we have opened a Support Request with the Number SR-129935-P8L4Y for you. A Software Support Specialist will contact you directly to follow up. We will update this thread with the solution as soon as we have resolved the Support Request. With best regards, DocuWare Support Team

At first copy / move the document from the basket to the file cabinet (Copy index data + content). Afterwards Clip the documents inside the file cabinet.Example code:

public static void ClipDocuments()
{
    // Get documents
    Document docBasket = GetDocument("<<fcID>>", <<docID>);
    Document docFileCabinet = GetDocument("<<fcID>>", <<docID>>);

    // Get file cabinet + basket and copy document
    FileCabinet basket = connection.GetFileCabinet(<<BasketID>>).GetFileCabinetFromSelfRelation();
    FileCabinet fc = connection.GetFileCabinet("<<FCID>>").GetFileCabinetFromSelfRelation();
    int docID = CopyFromBasketToFileCabinet(docBasket, fc);
   
    // Clip the documents
    ContentMergeOperationInfo operationInfo = new ContentMergeOperationInfo()
    {
        Documents = new List<int>() { docFileCabinet.Id, docID },
        Force = true,
        Operation = ContentMergeOperation.Clip,
    };
    fc.PutToContentMergeOperationRelationForDocument(operationInfo);
}

private static Document GetDocument(string FCGuid, int docID)
{
    return connection.GetFromDocumentForDocumentAsync(docID, FCGuid).Result;
}

private static int CopyFromBasketToFileCabinet(Document docBasket, FileCabinet fc)
{
    DialogInfo dialog = fc.GetDialogInfosFromStoresRelation().Dialog.First(d => d.FileCabinetId == fc.Id);
    Document docNew = dialog.PostToStoreDocumentRelationForDocument(docBasket);
    docNew.PostToSectionsRelationForSection("application/pdf", docBasket.Sections[0].GetSectionFromSelfRelation().GetStreamFromContentRelation());
    return docNew.Id;
}