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: base.rb
    path of file: ./repos/postal/app/lib/message_dequeuer
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module MessageDequeuer
  class Base

    class StopProcessing < StandardError
    end

    attr_reader :queued_m
    
    def hold_if_server_development_mode
      return if queued_message.manual?
      return unless queued_message.server.mode == "Development"

      log "server is in development mode, holding"
      create_delivery "Held", details: "Server is in development mode."
      remove_from_queue
      stop_processing
    end