nse of slower inference.   guidance_scale (float, optional, defaults to 7.5) —
A higher guidance scale value encourages the model to generate images closely linked to the text
prompt at the expense of lower image quality. Guidance scale is enabled when guidance_scale > 1.   gligen_phrases (List[str]) —
The phrases to guide what to include in each of the regions defined by the corresponding
gligen_boxes. There should only be one phrase per bound