No pad_token,eos_token,sep_token,cls_token in SentencePieceTokenizer
https://github.com/NVIDIA/NeMo/blob/70987d1c09776550304d76d3651f1e41ffe90a84/nemo/collections/common/tokenizers/sentencepiece_tokenizer.py#L191.   

Hi I find actually no pad_token,eos_token,sep_token,cls_token in SentencePieceTokenizer's property.    