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: 20170130000001_follow_up_possible_check_643.rb
    path of file: ./repos/zammad/db/migrate
    
    the code of the file until where you have to start completion: # Copyright (C) 2012-2024 Zammad Foundation, https://zammad-foundation.org/

class FollowUpPossibleCheck643 < ActiveRecord::Migration[4.2]
  def up

    # return if it's a new setup
    return if !Setting.exists?(name: 'system_init_done')

    Setting.create_if_not_exists(
      title:       'Define postmaster filter.',
      name:        '0200_postmaster_filter_follow_up_possible_check',
      area:        'Postmaster::PreFilter',
      description: 'Define postmaster filter to check if follow-ups get created (based on admin settings).',
      options:     {},
      state:       'Channel::Filter::FollowUpPossibleCheck',
      frontend:    false
    )

    ObjectManager::Attribute.add(
      force:       true,
      object:      'Group',
      name:        'follow_up_possible',
      display:     'Follow-up possible',
      data_type:   'select',
      data_option: {
        default:   'yes',
        options:   {
          yes:        'yes',
          new_ticket: 'do not reopen Ticket but create n
    
  def up

    # return if it's a new setup
    return if !Setting.exists?(name: 'system_init_done')

    Setting.create_if_not_exists(
      title:       'Define postmaster filter.',
      name:        '0200_postmaster_filter_follow_up_possible_check',
      area:        'Postmaster::PreFilter',
      description: 'Define postmaster filter to check if follow-ups get created (based on admin settings).',
      options:     {},
      state:       'Channel::Filter::FollowUpPossibleCheck',
      frontend:    false
    )

    ObjectManager::Attribute.add(
      force:       true,
      object:      'Group',
      name:        'follow_up_possible',
      display:     'Follow-up possible',
      data_type:   'select',
      data_option: {
        default:   'yes',
        options:   {
          yes:        'yes',
          new_ticket: 'do not reopen Ticket but create new Ticket'
        },
        null:      false,
        note:      'Follow-up for closed ticket possible or not.',
        translate: true
      },
      editable:    false,
      active:      true,
      screens:     {
        create: {
          '-all-' => {
            null: true,
          },
        },
        edit:   {
          '-all-' => {
            null: true,
          },
        },
      },
      to_create:   false,
      to_migrate:  false,
      to_delete:   false,
      position:    400,
    )

  end