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: destroy_model_service.rb
    path of file: ./repos/gitlabhq/app/services/ml
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Ml
  class DestroyM
    
    def execute
      return error unless @model.destroy

      package_deletion_result = ::Packages::MarkPackagesForDestructionService.new(
        packages: @model.all_packages,
        current_user: @user
      ).execute

      return packages_not_deleted if package_deletion_result.error?

      success
    end