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diff --git a/web/core/modules/views/tests/modules/views_test_data/src/Plugin/views/style/MappingTest.php b/web/core/modules/views/tests/modules/views_test_data/src/Plugin/views/style/MappingTest.php
new file mode 100644
index 000000000..3ae816a8d
--- /dev/null
+++ b/web/core/modules/views/tests/modules/views_test_data/src/Plugin/views/style/MappingTest.php
@@ -0,0 +1,63 @@
+<?php
+
+namespace Drupal\views_test_data\Plugin\views\style;
+
+use Drupal\views\Plugin\views\style\Mapping;
+use Drupal\views\Plugin\views\field\NumericField;
+
+/**
+ * Provides a test plugin for the mapping style.
+ *
+ * @ingroup views_style_plugins
+ *
+ * @ViewsStyle(
+ *   id = "mapping_test",
+ *   title = @Translation("Field mapping"),
+ *   help = @Translation("Maps specific fields to specific purposes."),
+ *   theme = "views_view_mapping_test",
+ *   display_types = {"normal", "test"}
+ * )
+ */
+class MappingTest extends Mapping {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function defineMapping() {
+    return [
+      'title_field' => [
+        '#title' => $this->t('Title field'),
+        '#description' => $this->t('Choose the field with the custom title.'),
+        '#toggle' => TRUE,
+        '#required' => TRUE,
+      ],
+      'name_field' => [
+        '#title' => $this->t('Name field'),
+        '#description' => $this->t('Choose the field with the custom name.'),
+      ],
+      'numeric_field' => [
+        '#title' => $this->t('Numeric field'),
+        '#description' => $this->t('Select one or more numeric fields.'),
+        '#multiple' => TRUE,
+        '#toggle' => TRUE,
+        '#filter' => 'filterNumericFields',
+        '#required' => TRUE,
+      ],
+    ];
+  }
+
+  /**
+   * Restricts the allowed fields to only numeric fields.
+   *
+   * @param array $fields
+   *   An array of field labels, keyed by the field ID.
+   */
+  protected function filterNumericFields(&$fields) {
+    foreach ($this->view->field as $id => $field) {
+      if (!($field instanceof NumericField)) {
+        unset($fields[$id]);
+      }
+    }
+  }
+
+}