code: def fix_wrong_open_unary_chain(
      gold_transition,
      pred_transition,
      gold_sequence,
      gold_index,
      root_labels,
  ):
      """
      Fix a wrong open/open in a unary chain by removing the skipped unary transitions
  
      Only applies is the wrong pred transition is a transition found higher up in the unary chain
      """
      # useful to have this check here in case the call is made independently in a unit test
      if gold_transition == pred_transition:
          return None
  
      if isinstance(gold_transition, OpenConstituent) and isinstance(
          pred_transition, OpenConstituent
      ):
          cur_index = (
              gold_index + 1
          )  # This is now a Close if we are in this particular context
          while (
              cur_index + 1 < len(gold_sequence)
              and isinstance(gold_sequence[cur_index], CloseConstituent)
              and isinstance(
                  gold_sequence[cur_index + 1], OpenConstituent
              )
          ):
              cur_index = cur_index + 1  # advance to the next Open
              if gold_sequence[cur_index] == pred_transition:
                  return (
                      gold_sequence[:gold_index]
                      + gold_sequence[cur_index:]
                  )
              cur_index = cur_index + 1  # advance to the next Close
  
      return None
  
imports: from enum import Enum, auto
  from stanza.models.constituency.dynamic_oracle import DynamicOracle
  from stanza.models.constituency.parse_transitions import Shift, OpenConstituent, CloseConstituent
label_desc: Use image node_id 2 for calling a global function with example usage: fix_wrong_open_unary_chain(gold_transition, pred_transition, gold_sequence, gold_index, root_labels) and returns: None, None, unknown