docstr: Collect the real parents of some node
code: def find_node_real_parents(cls, fx_graph, node_name, found_parents):
      """Collect the real parents of some node"""
  
      if "real_parents" in fx_graph[node_name].keys():
          return found_parents.union(
              fx_graph[node_name]["real_parents"]
          )
  
      parents = fx_graph[node_name]["parents"]
      for parent in parents:
          if parent in fx_graph.keys():  # not the input node
              if cls.__verbosity > 3:
                  print(
                      f"\tchecking parent {parent} of node {node_name}"
                  )
  
              # if it's a real node, just add it
              if (
                  "is_real" in fx_graph[parent].keys()
                  and fx_graph[parent]["is_real"]
              ):
                  found_parents.add(parent)
              else:  # otherwise, search its parents
                  found_parents = cls.find_node_real_parents(
                      fx_graph, parent, found_parents
                  )
  
      return found_parents
  
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 37 for calling the Permutation obj's underlying member method code with example usage: obj.find_node_real_parents(cls, fx_graph, node_name, found_parents) and returns: found_parents, found_parents