quiet.rb

def process(pull, attributes)
  pull.review_comments.find_each do |comment|
    rewrite_urls_in_model_body(comment)
    comment.updated_at = comment.created_at # fix for referred_at
    quiesce(comment, :ensure_synced_with_pull) do
      comment.save
    end
  end

  issue_post_processor.process(pull.issue, attributes)
end

def quiesce(object, method_name)
  original_method = object.method(method_name)
  object.send(:define_method, method_name) { }
  yield
ensure
  object.send(:define_method, method_name, original_method)
end