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: customization_template_sysprep.rb
    path of file: ./repos/manageiq/app/models
    
    the code of the file until where you have to start completion: class CustomizationTemplateSysprep < CustomizationTemplate
  DISKPART_FILENAME = "diskpart.txt".freeze
    
  def create_files_on_server(pxe_server, pxe_image, mac_address, windows_image, substitution_options)
    filepath = self.class.pxe_server_filepath(pxe_server, pxe_image, mac_address)
    unattend_contents = script_with_substitution(substitution_options)

    image_bat_options = substitution_options.merge(
      :windows_images_directory => pxe_server.windows_images_directory.chomp("/").gsub("/", "\\\\"),
      :windows_image_path       => windows_image.path.chomp("/").gsub("/", "\\\\"),
      :windows_image_index      => windows_image.index
    )
    image_bat_contents = self.class.substitute_erb(IMAGE_BAT_CONTENTS, image_bat_options)

    pxe_server.with_depot do
      pxe_server.write_file(File.join(filepath, DISKPART_FILENAME),  DISKPART_CONTENTS)
      pxe_server.write_file(File.join(filepath, IMAGE_BAT_FILENAME), image_bat_contents)
      pxe_server.write_file(File.join(filepath, UNATTEND_FILENAME),  unattend_contents)
    end
  end