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: metadata_finder.rb
    path of file: ./repos/dependabot-core/devcontainers/lib/dependabot/devcontainers
    
    the code of the file until where you have to start completion: # typed: strong
# frozen_string_literal: true

require "sorbet-runtime"

require "dependabot/metadata_finders"
require "dependabot/metadata_finders/base"

module Dependabot
  module Devcontainers
    class 
    
      def look_up_source
        # TODO: Make upstream changes to dev container CLI to point to docs.
        #       Specifically, 'devcontainers features info' can be augmented to expose documentationUrl
        nil
      end
    end
  end