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

module Ml
  module ModelVersions
    class DeleteService
      def initialize(project, name, version, user)
        @project = project
        @name = name
        @version = version
        @user = user
      end

      def execute
        model_version = Ml::ModelVersion
                          .by_project_id_name_and_version(@project.id, @name, @version)
        return ServiceRespon
    
      def execute
        model_version = Ml::ModelVersion
                          .by_project_id_name_and_version(@project.id, @name, @version)
        return ServiceResponse.error(message: 'Model not found') unless model_version

        if model_version.package.present?
          result = ::Packages::MarkPackageForDestructionService
                     .new(container: model_version.package, current_user: @user)
                     .execute

          return ServiceResponse.error(message: result.message) unless result.success?
        end