old_contents: import sys
  from django.db import migrations
  
  from ipam.utils import rebuild_prefixes
  
  
  def push_to_stack(stack, prefix):
      # Increment child count on parent nodes
      for n in stack:
          n['children'] += 1
      stack.append({
          'pk': prefix['pk'],
          'prefix': prefix['prefix'],
          'children': 0,
      })
  
  
  def populate_prefix_hierarchy(apps, schema_editor):
      """
      Populate _depth and _children attrs for all Prefixes.
      """
      Prefix = apps.get_model('ipam', 'Prefix')
      VRF = apps.get_model('ipam', 'VRF')
  
      total_count = Prefix.objects.count()
      if 'test' not in sys.argv:
          print(f'\nUpdating {total_count} prefixes...')
  
      # Rebuild the global table
      rebuild_prefixes(None)
  
      # Iterate through all VRFs, rebuilding each
      for vrf in VRF.objects.all():
          rebuild_prefixes(vrf)
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('ipam', '0047_prefix_depth_children'),
      ]
  
      operations = [
          migrations.RunPython(
              code=populate_prefix_hierarchy,
              reverse_code=migrations.RunPython.noop
          ),
      ]
  
new_contents: import sys
  from django.db import migrations
  
  from ipam.utils import rebuild_prefixes
  
  
  def populate_prefix_hierarchy(apps, schema_editor):
      """
      Populate _depth and _children attrs for all Prefixes.
      """
      Prefix = apps.get_model('ipam', 'Prefix')
      VRF = apps.get_model('ipam', 'VRF')
  
      total_count = Prefix.objects.count()
      if 'test' not in sys.argv:
          print(f'\nUpdating {total_count} prefixes...')
  
      # Rebuild the global table
      rebuild_prefixes(None)
  
      # Iterate through all VRFs, rebuilding each
      for vrf in VRF.objects.all():
          rebuild_prefixes(vrf)
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('ipam', '0047_prefix_depth_children'),
      ]
  
      operations = [
          migrations.RunPython(
              code=populate_prefix_hierarchy,
              reverse_code=migrations.RunPython.noop
          ),
      ]
  
subject: Remove unused function