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: test_batch_worker.rb
    path of file: ./repos/cloudtasker/spec/support
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

class TestBatchWorker
 
    
  def on_batch_complete
    level = job_args[0].to_i

    # Fail callbacks on their first few runs
    self.class.callback_error_counts[job_id] ||= 0
    self.class.callback_error_counts[job_id] += 1
    raise(StandardError, 'batch callback error') if self.class.callback_error_counts[job_id] <= 2

    # Register batch as complete
    self.class.callback_registry[level] ||= Set.new
    self.class.callback_registry[level].add(job_id)
  end