private void treeView4_DoubleClick(object sender, EventArgs e)
        {
            if (treeView4.SelectedNode == null)
            {
                MessageBox.Show("Please, select an item of the tree view");
                return;
            }

            log.Debug(" double click on treeview to navigate");

            KnowledgeController instance = KnowledgeController.instance();

            if (instance == null)
            {
                log.Debug(" controller is null ");
                return;
            }

            if (treeView4.SelectedNode.Tag == null)
            {
                log.Debug(" tag is null ");
                return;
            }

            string filepath = KnowledgeAdapter.getCurrentFilepath();

            log.Debug(" filepath = " + filepath);
            TextEditorHelper.navigate(instance, treeView4.SelectedNode.Tag, filepath);
        }
        private void convertButton_Click(object sender, EventArgs e)
        {
            ConvForm convForm = new ConvForm(KnowledgeAdapter.getCurrentFilepath(), KnowledgeController.instance().environment.ApplicationObject);//TODO:

            convForm.ShowDialog();
        }