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: spec_helper.rb
    path of file: ./repos/shoes4/shoes-core/spec/shoes
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require 'spec_helper'

def it_styles_with(*styles)
  supported_styles = unpack_styles(styles)
  spec_styles(supported_styles)
end

def unpack_styles(styles)
  supported_styles 
    
def unpack_styles(styles)
  supported_styles = []
  styles.each do |style|
    if Shoes::Common::Style::STYLE_GROUPS[style]
      Shoes::Common::Style::STYLE_GROUPS[style].each { |s| supported_styles << s }
    else
      supported_styles << style
    end
  end