+/*************
+ * Callbacks *
+ *************/
+
+/** @ingroup SURF_callbacks
+ * @brief Callbacks handler which emit the callbacks after WorkstationVM creation *
+ * @details Callback functions have the following signature: `void(WorkstationVMPtr)`
+ */
+extern surf_callback(void, WorkstationVMPtr) workstationVMCreatedCallbacks;
+
+/** @ingroup SURF_callbacks
+ * @brief Callbacks handler which emit the callbacks after WorkstationVM destruction *
+ * @details Callback functions have the following signature: `void(WorkstationVMPtr)`
+ */
+extern surf_callback(void, WorkstationVMPtr) workstationVMDestructedCallbacks;
+
+/** @ingroup SURF_callbacks
+ * @brief Callbacks handler which emit the callbacks after WorkstationVM State changed *
+ * @details Callback functions have the following signature: `void(WorkstationVMActionPtr)`
+ */
+extern surf_callback(void, WorkstationVMPtr) workstationVMStateChangedCallbacks;
+