code: private boolean checkMultipleColumnsEditorEnabled() {
          final int size = listEditor.getList().size();
          if (size == 2 && !listEditor.getEditors().isEmpty()) {
              final String cId = listEditor.getEditors().get(0).id().getValue();
              if (!restrictedColumns.contains(cId)) {
                  setEditorEnabled(0, true, null);
              }
              return true;
          }
          return false;
      }
docs: Checks that if multiple columns are used in data set -> the column editors must be enabed, if the columns are not are restricted.