STM32 CUBE IDE - taskEntry() function definition

Hi team,

I am developing a POC to change screen when we click an icon on the display in STM32 Cube IDE. I am using STM32F429I Disco board with ili9488 LCD driver and tsc2004 Touch Sensor Controller. I have developed the Graphics in TouchGFX designer. When I generate the code, I could not see the task Entry () function be called and executed. There is a function declaration such as virtual void taskEntry(); 

Can you suggest how and why taskEntry function is for and where it needs to be defined and the definition inside this call.

Thank you in advance.