lora_weights() for loading LoRA weights save_lora_weights() for saving LoRA weights from_single_file() for loading .ckpt files  __call__  < source > ( prompt: Union = None prompt_2: Union = None image: Union = None height: Optional = None width: Optional = None num_inference_steps: int = 50 guidance_scale: float = 5.0 negative_prompt: Union = None negative_prompt_2: Union = None num_images_per_prompt: Optional = 1 eta: float = 0.0 generator: Un