first draft of flaglist migrate, completly screwed up

web/modules/custom/materio_migrate/config/install/migrate_plus.migration.d7_flaglistitems.yml

@@ -0,0 +1,48 @@
+# This is the migrations file from Flag Lists D7
+id: d7_flaglistitems
+label: Materio Flag List Items D7
+migration_group: d7_materio
+#audit: true
+migration_tags:
+  - Drupal 7
+  - Content
+migration_dependencies:
+  required:
+    - d7_flaglists
+    - d7_users
+    - d7_node_article
+    - d7_node_materiau
+source:
+  plugin: d7_flaglistitems_materio
+#
+process:
+  id: fcid
+  # user_id: uid
+  user_id:
+    plugin: migration_lookup
+    migration: d7_users
+    source: uid
+
+  name:
+    plugin: concat
+    source:
+      - title
+      - entity_id
+    delimiter: ' '
+  baseflag: relatedflag
+  flag_list: fid
+  # entity_id: entity_id
+  entity_id:
+    -
+      plugin: skip_on_empty
+      method: process
+      source: linked_materials
+    -
+      plugin: migration_lookup
+      migration: d7_node_materiau
+      no_stub: true
+
+  # type: entity_type
+#
+destination:
+  plugin: entity:flag_list_item

web/modules/custom/materio_migrate/config/install/migrate_plus.migration.d7_flaglists.yml

@@ -0,0 +1,45 @@
+# This is the migrations file from Flag Lists D7
+id: d7_flaglists
+label: 'Materio Flagging Collections D7'
+migration_group: d7_materio
+audit: true
+migration_tags:
+  - Drupal 7
+  - Content
+  - materio
+migration_dependencies:
+  required:
+    - d7_users
+    - d7_node_article
+    - d7_node_materiau
+source:
+  plugin: d7_flaglists_materio
+  # key: migrate
+#
+process:
+  id: fid
+  vid: fid
+  langcode:
+    plugin: default_value
+    default_value: en
+  # needs migration_lookup
+  # user_id: uid
+  user_id:
+    plugin: migration_lookup
+    migration: d7_users
+    source: uid
+
+  name: title
+  # Shall be name from flag
+  # templateflag: name
+  # relatedflag: name
+  templateflag:
+    plugin: default_value
+    default_value: dossier
+  relatedflag:
+    plugin: default_value
+    default_value: dossier
+#
+destination:
+  plugin: entity:flagging_collection
+  default_bundle: dossier