diff --git a/pyjecteur/reactive.py b/pyjecteur/reactive.py
index f42d625..0b90d69 100644
--- a/pyjecteur/reactive.py
+++ b/pyjecteur/reactive.py
@@ -149,6 +149,11 @@ class L(ReactiveMixin):  # ruff: disable=invalid-name
         if self.light:
             self.light.attr_set_hook(self.key, self)
 
+    def set_all(self, l):
+        self._val = l
+        if self.light:
+            self.light.attr_set_hook(self.key, self)
+
     def __iter__(self):
         return self._val.__iter__()