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: set_name.rb
    path of file: ./repos/vagrant/plugins/providers/virtualbox/action
    
    the code of the file until where you have to start completion: # Copyright (c) HashiCorp, Inc.
# SPDX-License-Identifier: BUSL-1.1

require "log4r"

module VagrantPlugins
  module ProviderVirtualBox
    module Action
      class SetName
        def initialize(app, env)
          @logger = Log4r::Logger.new("vagrant::action::vm::setname")
          @app = app
        end

        def call(env)
          name = env[:machine].provi
    
        def call(env)
          name = env[:machine].provider_config.name

          # If we already set the name before, then don't do anything
          sentinel = env[:machine].data_dir.join("action_set_name")
          if !name && sentinel.file?
            @logger.info("Default name was already set before, not doing it again.")
            return @app.call(env)
          end

          # If no name was manually set, then use a default
          if !name
            prefix = "#{env[:root_path].basename.to_s}_#{env[:machine].name}"
            prefix.gsub!(/[^-a-z0-9_]/i, "")

            # milliseconds + random number suffix to allow for simultaneous
            # `vagrant up` of the same box in different dirs
            name = prefix + "_#{(Time.now.to_f * 1000.0).to_i}_#{rand(100000)}"
          end

          # Verify the name is not taken
          vms = env[:machine].provider.driver.read_vms
          raise Vagrant::Errors::VMNameExists, name: name if \
            vms.key?(name) && vms[name] != env[:machine].id

          if vms.key?(name)
            @logger.info("Not setting the name because our name is already set.")
          else
            env[:ui].info(I18n.t(
              "vagrant.actions.vm.set_name.setting_name", name: name))
            env[:machine].provider.driver.set_name(name)
          end