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: renderer.rb
    path of file: ./repos/gitlabhq/lib/banzai
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Banzai
  module Renderer
    # Convert a Markdown String into an HTML-safe String of HTML
    #
    # Note that while the returned HTML will have been sanitized of dangerous
    # HTML, it may post a risk of information leakage if it's not also passed
    # through `post_process`.
    #
    # Also note that the 
    
    def self.cache_collection_render(texts_and_contexts)
      items_collection = texts_and_contexts.each do |item|
        context = item[:context]

        if context.key?(:rendered)
          item[:rendered] = context.delete(:rendered)
        else
          # If the attribute didn't come in pre-rendered, let's prepare it for caching it in redis
          cache_key = full_cache_multi_key(context.delete(:cache_key), context[:pipeline])
          item[:cache_key] = cache_key if cache_key
        end
      end