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: sources.rb
    path of file: ./repos/rbs/lib/rbs/collection
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require_relative './sources/base'
require_relative './sources/git'
require_relative './sources/stdlib'
require_rela
    
      def self.from_config_entry(source_entry, base_directory:)
        case source_entry['type']
        when 'git', nil # git source by default
          # @type var source_entry: Git::source_entry
          Git.new(
            name: source_entry["name"],
            revision: source_entry["revision"],
            remote: source_entry["remote"],
            repo_dir: source_entry["repo_dir"]
          )
        when 'local'
          # @type var source_entry: Local::source_entry
          Local.new(
            path: source_entry['path'],
            base_directory: base_directory,
          )
        when 'stdlib'
          Stdlib.instance
        when 'rubygems'
          Rubygems.instance
        else
          raise
        end