Custom PostProcessor?

Is there a way to implement a custom post-processor?

On this forum, I did see people discussing how to implement a custom pre-tokenizer and normalizer, but I haven’t seen any posts discussing the post-processor.

My first guess was to subclass PostProcessor and implement num_special_tokens_to_add and process, but trying to initialize the subclass just gives a TypeError: No constructor defined.
(Assuming it has something to do with the Rust-Python binding and not having a __new__ method)

So, does the HuggingFace tokenizers library support custom post-processing? If so, is there any instruction or example code available?

Thank you.