Writes original, generated and real(target) images to Tensorboard.

def write(self)->None:
        "Writes original, generated and real(target) images to Tensorboard."
        orig_images, gen_images, real_images = self._get_image_tensors()
        self._write_images(name='orig images', images=orig_images)
        self._write_images(name='gen images',  images=gen_images)
        self._write_images(name='real images', images=real_images)