class_docstr: Add Prefix to src (& tgt) sentence.
code: def apply_reverse(self, translated):
      def _removeprefix(s, prefix):
          if s.startswith(prefix) and len(prefix) > 0:
              return s[len(prefix) + 1 :]
          else:
              return s
  
      corpus_prefix = self.prefix_dict.get("infer", None)
      return _removeprefix(translated, corpus_prefix["tgt"])
  
imports: from onmt.utils.logging import logger
  from onmt.transforms import register_transform
  from .transform import Transform, ObservableStats
label_desc: Use image node_id 9 for calling the PrefixTransform obj's underlying member method code with example usage: obj.apply_reverse(translated) and returns: _removeprefix, s, s