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: annotatable_entity.rb
    path of file: ./repos/lookbook/lib/lookbook/entities/concerns
    
    the code of the file until where you have to start completion: module Lookbook
  module AnnotatableEntity
    extend ActiveSupport::Concern

    in
    
      def fetch_config(key, fallback = nil, &block)
        value = case key.to_sym
        when :renders
          renders_config
        when :display_options
          display_options_config
        else
          tag(key).value if has_tag?(key)
        end