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: remote_file.rb
    path of file: ./repos/gitlabhq/app/services/import/gitlab_projects/file_acquisition_strategies
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Import
  module GitlabProjects
    module FileAcquisitionStrategies
      class RemoteFile
        include ActiveModel::Validations

 
    
        def headers
          return {} if file_url.blank?

          @headers ||= Gitlab::HTTP.head(file_url, timeout: 1.second).headers
        rescue StandardError => e
          errors.add(:base, "Failed to retrive headers: #{e.message}")

          {}
        end