un-understandable randomization of input data inside the generated code

[HAlzo]

Hello,

I am using STM32CubeMX Ver 5.5.0 with X-CUBE-AI .

In the generated code inside function MX_X_CUBE_AI_Process() I found the following code just before aiRun function

 /* ---------------------------------------- */
 /* Data generation and Pre-Process */
 /* ---------------------------------------- */
 /* - fill the input buffer with random data */
 for (ai_size i=0; i < AI_CNN_IN_1_SIZE; i++ ) {
 
 /* Generate random data in the range [-1, 1] */
 ai_float val = 2.0f * (ai_float)rand() / (ai_float)RAND_MAX - 1.0f;
 
 /* Convert the data if necessary */
 if (type_ == AI_BUFFER_FMT_TYPE_FLOAT) {
 ((ai_float *)in_data)[i] = val;
 } else { /* AI_BUFFER_FMT_TYPE_Q */
 /* Scale the values in the range [-2^M, 2^M] */
 val *= max_;
 /* Convert float to Qmn format */
 const ai_i32 tmp_ = AI_ROUND(val * scale_, ai_i32);
 in_data[i] = AI_CLAMP(tmp_, -128, 127, ai_i8);
 }
 }

I can't understand why the input buffer is filled with random data instead of the original input data?

I expect that all this code need to be commented, am I right?