s_memory_efficient_attention  < source > ( )    Disable memory efficient attention from xFormers.  class diffusers.AmusedImg2ImgPipeline  < source > ( vqvae: VQModel tokenizer: CLIPTokenizer text_encoder: CLIPTextModelWithProjection transformer: UVit2DModel scheduler: AmusedScheduler  )     __call__  < source > ( prompt: Union = None image: Union = None strength: float = 0.5 num_inference_steps: int = 12 guidance_scale: float = 10.0 negative_pr