stm32f4xx hal systick question

[Franksterb92]

in stm32f4xx_hal.c file the function __weak HAL_StatusTypeDef HAL_InitTick uses a function HAL_SYSTICK_Config thats in stm32f4xx_hal_cortex.c file and that function uses SysTick_Config(TicksNumb) but i cant find this function .just wondering where this function lives 

[Franksterb92]

turns out if you read you can learn things lol that SysTick_Config functions is inside of the core_cm4 arm file