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: sub_sequence.rb
    path of file: ./repos/zammad/lib/sequencer/unit/import/exchange/folder_contacts
    
    the code of the file until where you have to start completion: # Copyright (C) 2012-2024 Zammad Foundation, https://zammad-foundation.org/

class Sequencer::Unit::Import::Exchange::FolderContacts::SubSequence < Sequencer::Unit::Base
  include ::Sequencer::Unit::Exchange::Folders::Mixin::Folder
  include ::Sequencer::Uni
    
  def paginated_item_sequence(folder)

    total    = folder.total_count
    per_page = 1000
    pages    = (total.to_f / per_page).ceil

    display_path = ews_folder.display_path(folder)
    (1..pages).each do |page|

      offset = (page - 1) * per_page

      opts = {
        indexed_page_item_view: {
          max_entries_returned: per_page,
          offset:               offset,
          base_point:           'Beginning'
        }
      }

      logger.debug { "Fetching and processing #{per_page} items (page: #{page}, offset: #{offset}) from Exchange folder '#{display_path}' (total: #{total})" }

      process_folders(folder, display_path, opts)
    end
  end