private void GetDocumentFields(List <ExportDocumentDetail> exportDocuments)
        {
            documentContentFieldsValueCollection = new Dictionary <string, string>();

            var documentIds = exportDocuments.Select(document => document.DocumentId).ToList();

            var resultDocuments = DocumentBO.BulkGetDocumentsFieldsForExportJob(Convert.ToInt64(_exportLoadJobDetailBeo.MatterId),
                                                                                _dataset.CollectionId, documentIds, _selectedFieldIds);

            if (resultDocuments != null)
            {
                foreach (var exportDocument in exportDocuments)
                {
                    var document = resultDocuments.FirstOrDefault(d => d.DocumentId == exportDocument.DocumentId);
                    if (document != null)
                    {
                        exportDocument.Fields = document.FieldList;
                    }
                }
            }
        }