+ /**
+ * Fields for the entity to be assigned to the template.
+ *
+ * Fields may have keys
+ * - name (required to show in tpl from the array)
+ * - description (optional, will appear below the field)
+ * - not-auto-addable - this class will not attempt to add the field using addField.
+ * (this will be automatically set if the field does not have html in it's metadata
+ * or is not a core field on the form's entity).
+ * - help (option) add help to the field - e.g ['id' => 'id-source', 'file' => 'CRM/Contact/Form/Contact']]
+ * - template - use a field specific template to render this field
+ * - required
+ * - is_freeze (field should be frozen).
+ *
+ * @var array
+ */
+ protected $entityFields = [];
+