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: repo_synchronization.rb
    path of file: ./repos/hound/app/services
    
    the code of the file until where you have to start completion: class RepoSynchronization
  pattr_initialize :user

  def start
    user.repos.cl
    
  def github_repos
    installation_ids = user_api.user_installations.map(&:id)

    installation_ids.flat_map do |installation_id|
      installation_repos(installation_id.to_s).map do |repo|
        repo.to_hash.merge(installation_id: installation_id)
      end
    end
  end