--- /dev/null
+/**
+ * Implements hook_field_info_max_weight().
+ */
+function {{ machine_name }}_field_info_max_weight($entity_type, $bundle, $context) {
+ $weights = array();
+
+ foreach (my_module_entity_additions($entity_type, $bundle, $context) as $addition) {
+ $weights[] = $addition['weight'];
+ }
+
+ return $weights ? max($weights) : NULL;
+}