simplenews subscribers migration ok, simplenews admin ok

web/modules/custom/materio_migrate/config/install/migrate_plus.migration.d7_simplenews_subscribers.yml

@@ -0,0 +1,56 @@
+id: d7_simplenews_subscribers
+migration_group: d7_materio
+dependencies:
+  # config:
+  #   - migrate.migration.d7_simplenews_newsletter
+  module:
+    - migrate_drupal
+    - simplenews
+label: Simplenews subscribers
+migration_tags:
+  - Drupal 7
+  - Content
+  - Materio
+
+source:
+  plugin: simplenews_subscriber
+
+process:
+  id: snid
+  status: activated
+  mail: mail
+  # uid: uid
+  uid:
+    plugin: migration
+    migration: d7_users
+    source: uid
+
+  langcode: language
+  changes: changes
+  created: created
+
+  subscriptions:
+    plugin: iterator
+    source: subscriptions
+    process:
+      target_id:
+        plugin: static_map
+        source: newsletter_id
+        map:
+          6585: "test"
+          6374: "ze_daily_materio_"
+          6274: "materio_newsletter"
+          7881: "companies"
+        # plugin: migration
+        # migration: d7_simplenews_newsletter
+        # source: newsletter_id
+      status: status
+      timestamp: timestamp
+      source: source
+
+destination:
+  plugin: entity:simplenews_subscriber
+
+migration_dependencies:
+  required:
+    - d7_users