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diff --git a/web/core/modules/views/src/Plugin/views/wizard/WizardInterface.php b/web/core/modules/views/src/Plugin/views/wizard/WizardInterface.php
new file mode 100644
index 000000000..7e988e545
--- /dev/null
+++ b/web/core/modules/views/src/Plugin/views/wizard/WizardInterface.php
@@ -0,0 +1,59 @@
+<?php
+
+namespace Drupal\views\Plugin\views\wizard;
+
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Defines a common interface for Views Wizard plugins.
+ *
+ * @ingroup views_wizard_plugins
+ */
+interface WizardInterface {
+
+  /**
+   * Form callback to build other elements in the "show" form.
+   *
+   * This method builds all form elements beside of the selection of the
+   * base table.
+   *
+   * @param array $form
+   *   The full wizard form array.
+   * @param \Drupal\Core\Form\FormStateInterface $form_state
+   *   The current state of the wizard form.
+   *
+   * @return array
+   *   Returns the changed wizard form.
+   */
+  public function buildForm(array $form, FormStateInterface $form_state);
+
+  /**
+   * Validate form and values.
+   *
+   * @param array $form
+   *   The full wizard form array.
+   * @param \Drupal\Core\Form\FormStateInterface $form_state
+   *   The current state of the wizard form.
+   *
+   * @return array
+   *   An empty array if the view is valid; an array of error strings if it is
+   *   not.
+   */
+  public function validateView(array $form, FormStateInterface $form_state);
+
+  /**
+   * Creates a view from values that have already been validated.
+   *
+   * @param array $form
+   *   The full wizard form array.
+   * @param \Drupal\Core\Form\FormStateInterface $form_state
+   *   The current state of the wizard form.
+   *
+   * @return \Drupal\views\ViewEntityInterface
+   *   The created view object.
+   *
+   * @throws \Drupal\views\Plugin\views\wizard\WizardException
+   */
+  public function createView(array $form, FormStateInterface $form_state);
+
+}