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: base_model_concern.rb
    path of file: ./repos/fae/app/models/concerns/fae
    
    the code of the file until where you have to start completion: module Fae
  module BaseModelConcern
    extend ActiveSupport::Concern
    require 'csv'

    attr_accessor :filter

    included do
      include Fae
    
      def has_fae_file(file_name_symbol)
        has_one file_name_symbol, -> { where(attached_as: file_name_symbol.to_s) },
          as: :fileable,
          class_name: '::Fae::File',
          dependent: :destroy
        accepts_nested_attributes_for file_name_symbol, allow_destroy: true
      end