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: import_service.rb
    path of file: ./repos/mastodon/app/services
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require 'csv'

# NOTE: This is a deprecated service, only kept to not break ongoing imports
# on upgrade. See `BulkImportService` for its replacement.

class ImportService < BaseService
  ROWS_PROCESSING_LIMIT = 20_000

  def call(import)
    @import  = import
    @account = @import.account

    case @import.type
    when 'following'
      import_follows!
    when 'blocking'
      import_blocks!
    when 'muting'
      import_mutes!
    when 'domain_blocking'
      import_domain_blocks!
    when 'bookmarks'
      import_bookmarks!
    end
  end

  private

  def import_follows!
    parse_import_data!(['Account address'])
    import_relationships!('follow', 'unfollow', @account.following, ROWS_PROCESSING_LIMIT, reblogs: { header: 'Show boosts', default: true }, notify: { header: 'Notify on new posts', default: false }, languages: { he
    
  def import_relationships!(action, undo_action, overwrite_scope, limit, extra_fields = {})
    local_domain_suffix = "@#{Rails.configuration.x.local_domain}"
    items = @data.take(limit).map { |row| [row['Account address']&.strip&.delete_suffix(local_domain_suffix), extra_fields.to_h { |key, field_settings| [key, row[field_settings[:header]]&.strip || field_settings[:default]] }] }.reject { |(id, _)| id.blank? }

    if @import.overwrite?
      presence_hash = items.each_with_object({}) { |(id, extra), mapping| mapping[id] = [true, extra] }

      overwrite_scope.reorder(nil).find_each do |target_account|
        if presence_hash[target_account.acct]
          items.delete(target_account.acct)
          extra = presence_hash[target_account.acct][1]
          Import::RelationshipWorker.perform_async(@account.id, target_account.acct, action, extra.stringify_keys)
        else
          Import::RelationshipWorker.perform_async(@account.id, target_account.acct, undo_action)
        end
      end