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: autograde.rb
    path of file: ./repos/Autolab/app/controllers/assessment
    
    the code of the file until where you have to start completion: require "uri"
require "tango_client"
require_relative Rails.root.join("config", "autogradeConfig.rb")

##
# Contains all functions 
    
  def regradeBatch
    submission_ids = params[:submission_ids]

    # Now regrade only the most recent submissions. Keep track of
    # any handins that fail.
    submissions = submission_ids.map {|sid| @assessment.submissions.find_by_id(sid)}

    begin
      failed_list = sendJob_batch(@course, @assessment, submissions, @cud)
    rescue AssessmentAutogradeCore::AutogradeError => e
      if e.error_code == :missing_autograding_props
        # no autograding properties for this assessment
        flash[:error] = "Autograding failed because there are no autograding properties."
        redirect_to([@course, @assessment, :submissions]) && return
      end