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: data.rb
    path of file: ./repos/ruby-packer/ruby/gems/test-unit-3.3.4/lib/test/unit
    
    the code of the file until where you have to start completion: require "test/unit/data-sets"

module Test
  module Unit
    module Data
      class << self
        def included(base)
          base.extend(ClassMethods)
        end
      end

      
    
          def load_csv(file_name)
            require 'csv'
            first_row = true
            header = nil
            CSV.foreach(file_name) do |row|
              if first_row
                first_row = false
                if row.first == "label"
                  header = row[1..-1]
                  next
                end
              end