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: nop.rb
    path of file: ./repos/metasploit-framework/lib/msf/base/simple
    
    the code of the file until where you have to start completion: # -*- coding: binary -*-

module Msf
module Si
    
  def self.generate_simple(nop, length, opts)
    # Generate the nop sled using the options supplied
    buf = nop.generate_sled(length, opts)

    # Serialize the generated payload to some sort of format
    return Buffer.transform(buf, opts['Format'] || 'raw')
  end