code: def fix_open_close(
      gold_transition,
      pred_transition,
      gold_sequence,
      gold_index,
      root_labels,
  ):
      """
      Fix an Open replaced with a Close
  
      Call the Open NT_X
      Open legal, so there must be stuff:
        stuff NT_X
      Close legal, so there must be something to close:
        stuff_1 NT_Y stuff_2 NT_X
  
      The incorrect close makes the following brackets:
        (Y stuff_1 stuff_2)
      We were supposed to build
        (Y stuff_1 (X stuff_2 ...) (possibly more stuff))
      The simplest fix here is to reopen Y at this point.
  
      One issue might be if there is another bracket which encloses X underneath Y
      So, for example, the tree was supposed to be
        (Y stuff_1 (Z (X stuff_2 stuff_3) stuff_4))
      The pattern for this case is
        stuff_1 NT_Y stuff_2 NY_X stuff_3 close NT_Z stuff_4 close close
      """
      if not isinstance(gold_transition, OpenConstituent):
          return None
      if not isinstance(pred_transition, CloseConstituent):
          return None
  
      cur_index = advance_past_unaries(gold_sequence, gold_index)
      if cur_index >= len(gold_sequence):
          return None
      if not isinstance(gold_sequence[cur_index], OpenConstituent):
          return None
      if gold_sequence[cur_index].top_label in root_labels:
          return None
  
      prev_open_index = find_previous_open(gold_sequence, gold_index)
      if prev_open_index is None:
          return None
      prev_open = gold_sequence[prev_open_index]
      # prev_open is now NT_Y from above
  
      stuff_start = cur_index + 1
      assert isinstance(gold_sequence[stuff_start], Shift)
      stuff_end = advance_past_constituents(gold_sequence, stuff_start)
      # stuff_end is now the Close which ends NT_X
      # stuff_start:stuff_end is the stuff_3 block above
      cur_index = stuff_end + 1
      if cur_index >= len(gold_sequence):
          return None
      # if there are unary transitions here, we want to skip those.
      # those are unary transitions on X and cannot be recovered, since X is gone
      cur_index = advance_past_unaries(gold_sequence, cur_index)
      # now there is a certain failure case which has to be accounted for.
  
      # specifically, if there is a new non-terminal which opens
      # immediately after X closes, it is encompassing X in a way that
      # cannot be recovered now that part of X is stuck under Y.
      # The two choices at this point would be to eliminate the new
      # transition or just reject the tree from the repair
      # For now, we reject the tree
      if isinstance(gold_sequence[cur_index], OpenConstituent):
          return None
  
      repair = (
          gold_sequence[:gold_index]
          + [pred_transition, prev_open]
          + gold_sequence[stuff_start:stuff_end]
          + gold_sequence[cur_index:]
      )
      return repair
  
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 11 for calling a global function with example usage: fix_open_close(gold_transition, pred_transition, gold_sequence, gold_index, root_labels) and returns: repair, None, None, None, None, None, None, None, None