sible for encoding the prompt into input tokens.   Returns 
str or list of str
  
The converted prompt
  Processes prompts that include a special token corresponding to a multi-vector textual inversion embedding to
be replaced with multiple special tokens each corresponding to one of the vectors. If the prompt has no textual
inversion token or if the textual inversion token is a single vector, the input prompt is returned.  StableDiffusionXLLor