--- /dev/null
+<?php
+
+namespace Drupal\migrate_plus;
+
+/**
+ * Defines an interface for data parsers.
+ *
+ * @see \Drupal\migrate_plus\Annotation\DataParser
+ * @see \Drupal\migrate_plus\DataParserPluginBase
+ * @see \Drupal\migrate_plus\DataParserPluginManager
+ * @see plugin_api
+ */
+interface DataParserPluginInterface extends \Iterator, \Countable {
+
+}