docstr: "Find a good permutation for some sibling group
code: def find_sibling_group_permutation(cls, fx_graph, sibling_group_id):
      """ "Find a good permutation for some sibling group"""
  
      if cls.__verbosity > 1:
          print(
              f"Finding permutation for sibling group {sibling_group_id}"
          )
  
      cls.reset_seed()
  
      sibling_group = cls.__group_data["sibling_groups"][
          sibling_group_id
      ]
      sibling_group_C_param = int(
          cls.__group_data["sibling_group_C_params"][sibling_group_id]
      )
  
      if sibling_group_C_param % 4 != 0 or sibling_group_C_param < 8:
          cls.skip_sibling_group(
              fx_graph,
              sibling_group_id,
              f"Useless C: {sibling_group_C_param}",
          )
          return
  
      # collect *sparse* weights from all siblings, get the coparent group
      matrix_group = cls.collect_sparse_weights(
          fx_graph, sibling_group, sibling_group_C_param
      )
  
      # early-out if no siblings are sparse
      if matrix_group is None:
          cls.skip_sibling_group(fx_graph, sibling_group_id, "Dense")
          return
  
      # find a good permutation
      group_permutation, found = cls.find_permutation_for_matrix_group(
          matrix_group
      )
  
      # if no permutation was found, we didn't need it (input already sparse)
      if not found:
          cls.skip_sibling_group(
              fx_graph, sibling_group_id, "Not needed"
          )
          return
  
      if cls.__verbosity > 2:
          print(
              f"Permutation for sibling group {sibling_group_id}: {group_permutation}"
          )
  
      cls.__group_data["sibling_group_permutations"][
          sibling_group_id
      ] = group_permutation
  
imports: import os
  import torch
  import json
  import string
  import time
  import numpy
  import sys
  import builtins
  import io
label_desc: Use image node_id 16 for calling the Permutation obj's underlying member method code with example usage: obj.find_sibling_group_permutation(cls, fx_graph, sibling_group_id) without return types