docstr: Return the tags known by this model
  
  Removes the S-, B-, etc, and does not include O
  Specify model_idx if the processor  has more than one model
docstr_tok: ["Return","the","tags","known","by","this","model","Removes","the","S-",",","B-",",","etc",",","and","does","not","include","O","Specify","model_idx","if","the","processor","has","more","than","one","model"]
code: def get_known_tags(self, model_idx=0):
      """
      Return the tags known by this model
  
      Removes the S-, B-, etc, and does not include O
      Specify model_idx if the processor  has more than one model
      """
      return self.trainers[model_idx].get_known_tags()
  
file_path: stanza/stanza/pipeline/ner_processor.py
imports: import torch
  import logging
  from stanza.models.common import doc
  from stanza.models.common.exceptions import ForwardCharlmNotFoundError, BackwardCharlmNotFoundError
  from stanza.models.common.utils import unsort
  from stanza.models.ner.data import DataLoader
  from stanza.models.ner.trainer import Trainer
  from stanza.models.ner.utils import merge_tags
  from stanza.pipeline._constants import *
  from stanza.pipeline.processor import UDProcessor, register_processor
label_desc: Use image node_id 8 for calling the NERProcessor obj's underlying member method code with example usage: obj.get_known_tags(model_idx) and returns: self