DX: type-hing oneToMany and ManyToMany properties as collection

src/Bundle/ChillCustomFieldsBundle/Entity/CustomFieldsGroup.php

@@ -35,14 +35,13 @@ class CustomFieldsGroup
      * The custom fields of the group.
      * The custom fields are asc-ordered regarding to their property "ordering".
      *
-     * @var Collection
-     *
+     * @var Collection<CustomField>
      * @ORM\OneToMany(
      *     targetEntity="Chill\CustomFieldsBundle\Entity\CustomField",
      * mappedBy="customFieldGroup")
      * @ORM\OrderBy({"ordering": "ASC"})
      */
-    private $customFields;
+    private Collection $customFields;
 
     /**
      * @var string