private void ExtractedDocsDataGridView_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            string errorMsg;
            var    selectedDocument = GridViewHelper.GetCurrentGridRowTag <IClassifiedDocument>(ExtractedDocsDataGridView, out errorMsg);

            if (selectedDocument == null)
            {
                MessageBox.Show(errorMsg);
            }
            else
            {
                LoadDocument(selectedDocument);
            }
        }