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: options.rb
    path of file: ./repos/ruby/spec/mspec/lib/mspec/utils
    
    the code of the file until where you have to start completion: require 'mspec/version'

MSPEC_HOME = File.expand_path('../../../..', __FILE__)

class MSpecOption
  attr_reader :short, :long, :arg, :description, :block

  def initia
    
  def action_filters
    on("-K", "--action-tag", "TAG",
       "Spec descriptions marked with TAG will trigger the specified action") do |o|
      config[:atags] << o
    end
    on("-S", "--action-string", "STR",
       "Spec descriptions matching STR will trigger the specified action") do |o|
      config[:astrings] << o
    end
  end