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: arglist.rb
    path of file: ./repos/opal/lib/opal/nodes
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require 'opal/n
    
      def compile
        code, work = [], []

        children.each do |current|
          splat = current.type == :splat
          arg = expr(current)

          if splat
            if work.empty?
              if code.empty?
                code << arg
              else
                code << fragment('.concat(') << arg << fragment(')')
              end
            else
              if code.empty?
                code << fragment('[') << work << fragment(']')
              else
                code << fragment('.concat([') << work << fragment('])')
              end