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: mix.rb
    path of file: ./repos/LicenseFinder/lib/license_finder/package_managers
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module LicenseFinder
  class Mix < PackageManager
    def initialize(options = {})
      super
      @command = options[:mix_command] || package_management_command
      @elixir_command = options[:elixir_command] || 'elixir'
      @deps_path = Pathname(
    
    def installed?(logger = Core.default_logger)
      if package_management_command.nil?
        logger.debug self.class, 'no command defined'
        true
      elsif command_exists?('elixir') && command_exists?('mix')
        logger.debug self.class, 'is installed', color: :green
        true
      else
        logger.info self.class, '(elixir) is not installed', color: :red
        false
      end