You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: 20170210211932_clean_up_groups.rb
    path of file: ./repos/kitsu-server/db/migrate
    
    the code of the file until where you have to start completion: class CleanUpGroups < ActiveRecord::Migration[4.2]
  def change
    # Get rid of old trending stuff
    execute 'DROP VIEW IF EXISTS group_members_histogram CASCADE'

    # Clean up Groups
    change_table :groups do |t|
      t.text :rules
      t.text :rules_formatted
      t.remove :bio, :about_formatted
     
    
  def change
    # Get rid of old trending stuff
    execute 'DROP VIEW IF EXISTS group_members_histogram CASCADE'

    # Clean up Groups
    change_table :groups do |t|
      t.text :rules
      t.text :rules_formatted
      t.remove :bio, :about_formatted
      t.rename :confirmed_members_count, :members_count
      t.boolean :nsfw, default: false, null: false
      t.index :slug, unique: true
      t.change :created_at, :datetime, null: false
      t.change :updated_at, :datetime, null: false
      t.change :avatar_processing, :boolean, null: false, default: false
    end
  end