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: down.rb
    path of file: ./repos/stackneveroverflow/vendor/bundle/ruby/2.3.0/gems/byebug-9.0.6/lib/byebug/commands
    
    the code of the file until where you have to start completion: require 'pathname'
require 'byebug/command'
require 'byebug/helpers/frame'
require 'byebug/helpers/parse'

module Byebug
  #
  # Move the current frame down in the backtrace.
  #
  class DownCommand < Command
    include Helpers::FrameHelper
    include Helpers::ParseHelper

    self.allow_in_post_mortem = true

    def self.regexp
      /^\s* down (?:\s+(\S+))? \s*$/x
    end

    def self.description
      <<-EOD
        down[ count]

        #{sho
    
    def self.regexp
      /^\s* down (?:\s+(\S+))? \s*$/x
    end

    def self.description
      <<-EOD
        down[ count]

        #{short_description}

        Use the "bt" command to find out where you want to go.
      EOD
    end

    def self.short_description
      'Moves to a lower frame in the stack trace'
    end

    def execute
      pos, err = parse_steps(@match[1], 'Down')
      return errmsg(err) unless pos

      jump_frames(-pos)

      ListCommand.new(processor).execute if Setting[:autolist]
    end
  end