class Dependabot::PullRequestCreator::MessageBuilder

def pr_notices
  notices = @notices || []
  unique_messages = notices.filter_map do |notice|
    Dependabot::Notice.markdown_from_description(notice) if notice.show_in_pr
  end.uniq
  message = unique_messages.join("\n\n")
  message.empty? ? nil : message
end