prompt_attention_mask: Optional = None clean_caption: bool = False **kwargs  )   Parameters   prompt (str or List[str], optional) —
prompt to be encoded   negative_prompt (str or List[str], optional) —
The prompt not to guide the image generation. If not defined, one has to pass negative_prompt_embeds
instead. Ignored when not using guidance (i.e., ignored if guidance_scale is less than 1). For
PixArt-Alpha, this should be "".   do_classifier_f