TokenizerFast with various units (e.g., BPE, wordpiece, word, character, unigram)

I am using BartTokenizerFast to encode & decode my dataset.
I can find the documentation for using BPE unit for TokenizerFast

Is there any useful documentation for using other units (e.g., wordpiece, word, character) for TokenizerFast?

Thank you !

Yes all the doc is here:

cc @anthony @Narsil