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: tns_service_name.rb
    path of file: ./repos/metasploit-framework/modules/exploits/windows/oracle
    
    the code of the file until where you have to start completion: ##
# This module requires
    
  def check
    connect

    version = "(CONNECT_DATA=(COMMAND=VERSION))"
    pkt = tns_packet(version)
    sock.put(pkt)

    sock.get_once
    res = sock.get_once(-1, 1)

    disconnect

    if ( res and res =~ /32-bit Windows: Version 8\.1\.7\.0\.0/ )
      return Exploit::CheckCode::Appears
    end