Add some more methods

openVulkanoCpp/Base/Event.hpp

@@ -207,6 +207,11 @@ namespace openVulkanoCpp
 		}
 
 	public:
+		[[nodiscard]] bool HasHandlers() const
+		{
+			return !handlers.empty();
+		}
+
 		void NotifyAll(Arguments... args) const
 		{
 			std::shared_lock<std::shared_mutex> lock(mutex);