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