diff --git a/stimBuffApis/livoxGen1/ioUringAssemblyEngine.h b/stimBuffApis/livoxGen1/ioUringAssemblyEngine.h
index 2525cea..aa1ea4c 100644
--- a/stimBuffApis/livoxGen1/ioUringAssemblyEngine.h
+++ b/stimBuffApis/livoxGen1/ioUringAssemblyEngine.h
@@ -36,10 +36,6 @@ public:
 	bool setup();
 	void finalize();
 
-	typedef std::function<void(void*, int)> resetAndAssembleFrameCbFn;
-	void resetAndAssembleFrame(resetAndAssembleFrameCbFn onCqeReady);
-	void stop(bool doAcquireLock = true);
-
 	typedef std::function<void(bool, AsynchronousLoop)> assembleFrameReqCbFn;
 	void assembleFrameReq(Callback<assembleFrameReqCbFn> cb);
 
@@ -50,6 +46,11 @@ public:
 	static bool compactionIsNeeded(uint32_t nSucceeded, uint32_t nTotal)
 		{ return nSucceeded != 0 && nTotal != 0 && nSucceeded != nTotal; }
 
+private:
+	typedef std::function<void(void*, int)> resetAndAssembleFrameCbFn;
+	void resetAndAssembleFrame(resetAndAssembleFrameCbFn onCqeReady);
+	void stop(bool doAcquireLock = true);
+
 private:
 	PcloudStimulusBuffer& parent;
 
diff --git a/stimBuffApis/livoxGen1/openClCollatingAndMeshingEngine.h b/stimBuffApis/livoxGen1/openClCollatingAndMeshingEngine.h
index 9709a0b..a339ac6 100644
--- a/stimBuffApis/livoxGen1/openClCollatingAndMeshingEngine.h
+++ b/stimBuffApis/livoxGen1/openClCollatingAndMeshingEngine.h
@@ -41,11 +41,16 @@ public:
 	bool setup();
 	void finalize();
 
+	typedef std::function<void(bool, StimulusFrame&)>
+		compactCollateAndMeshFrameReqCbFn;
+	void compactCollateAndMeshFrameReq(
+		AsynchronousLoop& asyncLoop, StimulusFrame& stimulusFrame,
+		Callback<compactCollateAndMeshFrameReqCbFn> callback);
+
+private:
 	// Callback function types
 	typedef std::function<void(cl_int)> compactKernelCbFn;
 	typedef std::function<void(cl_int)> collateKernelCbFn;
-	typedef std::function<void(bool, StimulusFrame&)>
-		compactCollateAndMeshFrameReqCbFn;
 
 	bool startCompactKernel(
 		StagingBuffer& assemblyBuff, uint32_t nSucceeded,
@@ -58,10 +63,7 @@ public:
 	void stopCollateKernel();
 	void stop();
 
-	void compactCollateAndMeshFrameReq(
-		AsynchronousLoop& asyncLoop, StimulusFrame& stimulusFrame,
-		Callback<compactCollateAndMeshFrameReqCbFn> callback);
-
+public:
 	// Get kernel execution durations in milliseconds
 	std::chrono::milliseconds getCompactKernelDuration() const;
 	std::chrono::milliseconds getCollateKernelDuration() const;