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: sysprep_template_mixin.rb
    path of file: ./repos/manageiq/app/models/mixins
    
    the code of the file until where you have to start completion: module SysprepTemplateMixin
  def allowed_sysprep_customizati
    
  def allowed_sysprep_customization_templates(_options = {})
    result = []
    return result if (source = load_ar_obj(get_source_vm)).blank?
    return result unless source.platform.casecmp('windows').zero?

    customization_template_id = get_value(@values[:customization_template_id])
    @values[:customization_template_script] = nil if customization_template_id.nil?

    result = CustomizationTemplateSysprep.in_region(source.region_number).all.collect do |c|
      @values[:customization_template_script] = c.script if c.id == customization_template_id
      build_ci_hash_struct(c, %i[name description updated_at])
    end

    result.compact!
    @values[:customization_template_script] = nil if result.blank?
    result
  end