class_docstr: Helper class to merge Unbind->Cat/Stack. Many of the cases are similar to SplitCatSimplifier.
  
  Unbind can't be simplified like splits. So, we can only remove the unbind node. Other than this,
  other cases like multiple users, additional args, dim mismatch are similar to `SplitCatSimplifier`,
  hence we extend that class.
class_docstr_tok: ["Helper","class","to","merge","Unbind-",">","Cat\/Stack",".","Many","of","the","cases","are","similar","to","SplitCatSimplifier",".","Unbind","ca","n't","be","simplified","like","splits",".","So",",","we","can","only","remove","the","unbind","node",".","Other","than","this",",","other","cases","like","multiple","users",",","additional","args",",","dim","mismatch","are","similar","to","`","SplitCatSimplifier","`",",","hence","we","extend","that","class","."]
code: def remove_unbind(
      self,
      graph: torch.fx.Graph,
      unbind_node: torch.fx.Node,
  ):
      num_unbind = (
          max(
              getitem_node.args[1]
              for getitem_node in unbind_node.users.keys()
          )
          + 1
      )
      split_sections = [1 for _ in range(num_unbind)]
  
      super().simplify(graph, unbind_node, split_sections)
  
imports: import itertools
  import logging
  import operator
  from typing import Any, Callable, List, Optional, Sequence, Set, Tuple, Union
  from typing_extensions import TypeAlias
  import torch
  from torch._dynamo.utils import counters
  from ..pattern_matcher import Arg, CallFunction, CallFunctionVarArgs, CallMethodVarArgs, config_flag, FailedMatch, get_arg_value, Ignored, KeywordArg, ListOf, Match, MatchContext, MULTIPLE, PatternExpr, register_graph_pattern, RepeatedExpr
  from .pre_grad import merge_getitem_cat_pass, merge_splits_pass, normalization_pass, split_cat_pass, unbind_stack_pass
label_desc: Use image node_id 1 for calling the UnbindCatRemover obj's underlying member method code with example usage: obj.remove_unbind(graph, unbind_node) without return types