Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/migrate/src/Plugin/RequirementsInterface.php

@@ -0,0 +1,23 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\migrate\Plugin\RequirementsInterface.
+ */
+
+namespace Drupal\migrate\Plugin;
+
+/**
+ * An interface to check for a migrate plugin requirements.
+ */
+interface RequirementsInterface {
+
+  /**
+   * Checks if requirements for this plugin are OK.
+   *
+   * @throws \Drupal\migrate\Exception\RequirementsException
+   *   Thrown when requirements are not met.
+   */
+  public function checkRequirements();
+
+}