better example

include/sp/default/DefaultPacket.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include <sp/protocol/Message.h>
+#include <sp/protocol/GenericHandler.h>
+
+namespace sp {
+class PacketHandler;
+
+using PacketMessage = Message<
+	option::MsgIdType<std::uint8_t>,							// add id() operation
+	option::ReadOperations,										// add read() operation
+	option::WriteOperations,									// add write() operation
+	option::Handler<PacketHandler>								// add dispatch() operation
+	>;
+
+}  // namespace sp