Add a swap method for dynamic item's dispatching

discord/ui/action_row.py

@@ -67,6 +67,7 @@ if TYPE_CHECKING:
     from ..components import SelectOption
     from ..interactions import Interaction
     from .container import Container
+    from .dynamic import DynamicItem
 
     SelectCallbackDecorator = Callable[[ItemCallbackType['S', BaseSelectT]], BaseSelectT]
 
@@ -194,6 +195,10 @@ class ActionRow(Item[V]):
         # it should error anyways.
         return True
 
+    def _swap_item(self, base: Item, new: DynamicItem, custom_id: str) -> None:
+        child_index = self._children.index(base)
+        self._children[child_index] = new  # type: ignore
+
     @property
     def width(self):
         return 5