Writes model generated, original and real images to Tensorboard

def _write_images(self, iteration:int)->None:
        "Writes model generated, original and real images to Tensorboard"
        self.img_gen_vis.write(learn=self.learn, trn_batch=self.trn_batch, val_batch=self.val_batch, iteration=iteration, 
                               tbwriter=self.tbwriter)