Where is the platform implementation for HAL::initialize()?

[HRidd.2]

I've been drilling down into some code used to initialize the touch controller in STM32TouchController::init(), but am having a lot of trouble finding where in ST's api actually calls this init() function. I can see that the initialize() method on the static instance of TouchGFXHAL is called, which calls the parent class TouchGFXGeneratedHAL::initialize(), which eventually calls the top level parent class touchgfx::HAL::initialize(). In HAL.hpp I can see that the touchcontroller reference touchCtrl is stored by reference in the member variable touchController:

/**
     * Initializes a new instance of the HAL class.
     *
     * @param [in] dmaInterface Reference to the DMA interface.
     * @param [in] display      Reference to the LCD.
     * @param [in] touchCtrl    Reference to the touch controller.
     * @param width             The width of the LCD display, in pixels.
     * @param height            The height of the LCD display, in pixels.
     */
    HAL(DMA_Interface& dmaInterface, LCD& display, TouchController& touchCtrl, uint16_t width, uint16_t height)
        : dma(dmaInterface),
          lcdRef(display),
          touchController(touchCtrl),
          mcuInstrumentation(0),
          buttonController(0),
          frameBufferAllocator(0),
          gestures(),
          nativeDisplayOrientation(ORIENTATION_LANDSCAPE),
          taskDelayFunc(0),
          frameBuffer0(0),
          frameBuffer1(0),
          frameBuffer2(0),
          refreshStrategy(REFRESH_STRATEGY_DEFAULT),
          fingerSize(1),
          lockDMAToPorch(false),
          frameBufferUpdatedThisFrame(false),
          auxiliaryLCD(0),
          partialFrameBufferRect(),
          listener(0),
          lastX(0),
          lastY(0),
          touchSampleRate(1),
          mcuLoadPct(0),
          vSyncCnt(0),
          vSyncForFrame(1),
          vSyncCompensationEnabled(false),
          clientDirty(false),
          swapRequested(false),
          lastTouched(false),
          updateMCULoad(0),
          cc_begin(0),
          requestedOrientation(ORIENTATION_LANDSCAPE),
          displayOrientationChangeRequested(false),
          useAuxiliaryLCD(false),
          useDMAAcceleration(true),
          lastRenderMethod(HARDWARE)
    {
        instance = this;
        FRAME_BUFFER_WIDTH = DISPLAY_WIDTH = width;
        FRAME_BUFFER_HEIGHT = DISPLAY_HEIGHT = height;
        DISPLAY_ROTATION = rotate0;
        nativeDisplayOrientation = ((width >= height) ? ORIENTATION_LANDSCAPE : ORIENTATION_PORTRAIT);
    }

However, I can't for the life of me find the actual implementation of the parent class's initalize() function:

    /**
     * This function initializes the HAL, DMA, TouchController, and interrupts.
     *
     * @see configureInterrupts
     */
    virtual void initialize();

From trial and error this is definitely the function that ends up caling touchController.init(), I just can't find where it does this. Any help is greatly appreciated...