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: section.rb
    path of file: ./repos/truffleruby/lib/mri/rdoc/context
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require 'cgi/util'


    
  def in_files
    return [] if @comments.empty?

    case @comments
    when Array then
      @comments.map do |comment|
        comment.file
      end
    when RDoc::Markup::Document then
      @comment.parts.map do |document|
        document.file
      end
    else
      raise RDoc::Error, "BUG: unknown comment class #{@comments.class}"
    end