code: def backwards(self, orm):
      # Deleting model 'Selection'
      db.delete_table("timeside_selections")
  
      # Removing M2M table for field items on 'Selection'
      db.delete_table(db.shorten_name("timeside_selections_items"))
  
      # Removing M2M table for field selections on 'Selection'
      db.delete_table(db.shorten_name("timeside_selections_selections"))
  
      # Deleting model 'Item'
      db.delete_table("timeside_items")
  
      # Deleting model 'Experience'
      db.delete_table("timeside_experiences")
  
      # Removing M2M table for field presets on 'Experience'
      db.delete_table(db.shorten_name("timeside_experiences_presets"))
  
      # Removing M2M table for field experiences on 'Experience'
      db.delete_table(
          db.shorten_name("timeside_experiences_experiences")
      )
  
      # Deleting model 'Processor'
      db.delete_table("timeside_processors")
  
      # Deleting model 'Preset'
      db.delete_table("timeside_presets")
  
      # Deleting model 'Result'
      db.delete_table("timeside_results")
  
      # Deleting model 'Task'
      db.delete_table("timeside_tasks")
  
imports: from south.utils import datetime_utils
  from south.db import db
  from south.v2 import SchemaMigration
  from django.db import models
label_desc: Use image node_id 2 for calling the Migration obj's underlying member method code with example usage: obj.backwards(orm) without return types