+/** @ingroup SURF_callbacks
+ * @brief Callbacks handler which emit the callbacks after Storage destruction *
+ * @details Callback functions have the following signature: `void(StoragePtr)`
+ */
+XBT_PUBLIC_DATA(simgrid::xbt::signal<void(simgrid::surf::Storage*)>) storageDestructedCallbacks;
+
+/** @ingroup SURF_callbacks
+ * @brief Callbacks handler which emit the callbacks after Storage State changed *
+ * @details Callback functions have the following signature: `void(StorageAction *action, int previouslyOn, int currentlyOn)`
+ */
+XBT_PUBLIC_DATA(simgrid::xbt::signal<void(simgrid::surf::Storage*, int, int)>) storageStateChangedCallbacks;
+
+/** @ingroup SURF_callbacks
+ * @brief Callbacks handler which emit the callbacks after StorageAction State changed *
+ * @details Callback functions have the following signature: `void(StorageAction *action, simgrid::surf::Action::State old, simgrid::surf::Action::State current)`
+ */
+XBT_PUBLIC_DATA(simgrid::xbt::signal<void(simgrid::surf::StorageAction*, simgrid::surf::Action::State, simgrid::surf::Action::State)>) storageActionStateChangedCallbacks;