code: def _set_up_requires(self):
      self._pretagged = self._config.get("pretagged", None)
      if self._pretagged:
          self._requires = set()
      elif self.config.get("pos") and not self.use_identity:
          self._requires = LemmaProcessor.REQUIRES_DEFAULT.union(
              set([POS])
          )
      else:
          self._requires = LemmaProcessor.REQUIRES_DEFAULT
  
file_path: stanza/stanza/pipeline/lemma_processor.py
imports: from itertools import compress
  import torch
  from stanza.models.common import doc
  from stanza.models.lemma.data import DataLoader
  from stanza.models.lemma.trainer import Trainer
  from stanza.pipeline._constants import *
  from stanza.pipeline.processor import UDProcessor, register_processor
label_desc: Use image node_id 4 for calling the LemmaProcessor obj's underlying member method code with example usage: obj._set_up_requires() without return types