Callback function that writes batch end appropriate data to Tensorboard.

def on_batch_end(self, iteration:int, **kwargs)->None:
        "Callback function that writes batch end appropriate data to Tensorboard."
        super().on_batch_end(iteration=iteration, **kwargs)
        if iteration == 0: return
        if iteration % self.visual_iters == 0: self._write_images(iteration=iteration)