tab group content

Closes #2948150

src/Plugin/views/style/ViewsBootstrapTab.php

@@ -38,6 +38,13 @@ class ViewsBootstrapTab extends StylePluginBase {
    */
   protected $usesRowPlugin = TRUE;
 
+  /**
+   * Does the style plugin support grouping of rows.
+   *
+   * @var bool
+   */
+  protected $usesGrouping = FALSE;
+
   /**
    * Definition.
    */
@@ -66,6 +73,13 @@ class ViewsBootstrapTab extends StylePluginBase {
         '#description' => $this->t('Select the field that will be used as the tab.'),
       ];
 
+      $form['tab_group'] = [
+        '#type' => 'checkbox',
+        '#title' => $this->t('Group by tab field'),
+        '#default_value' => $this->options['tab_group'],
+        '#description' => $this->t('If you want to group tabs by same values.'),
+      ];
+
       $form['tab_type'] = [
         '#type' => 'select',
         '#title' => $this->t('Tab Type'),