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: repository_importer.rb
    path of file: ./repos/gitlabhq/lib/gitlab/bitbucket_server_import/importers
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Gitlab
  module BitbucketServerImport
    module Importers
     
    
        def execute
          log_info(import_stage: 'import_repository', message: 'starting import')

          if project.empty_repo?
            project.repository.import_repository(project.import_url)
            project.repository.fetch_as_mirror(project.import_url, refmap: refmap)

            validate_repository_size!

            update_clone_time
          end