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: bundle_indexing.rb
    path of file: ./repos/picky/server/lib/picky
    
    the code of the file until where you have to start completion: module Picky

  # A Bundle is a number of indexes
  # per [index, category] combination.
  #
  # At most, there are three indexes:
  # * *core* index (always used)
  # * *w
    
    def dump
      @backend_inverted.dump @inverted
      # THINK about this. Perhaps the strategies should implement the backend methods? Or only the internal index ones?
      #
      @backend_weights.dump @weights if @weight_strategy.respond_to?(:saved?) && @weight_strategy.saved?
      @backend_similarity.dump @similarity if @similarity_strategy.respond_to?(:saved?) && @similarity_strategy.saved?
      @backend_configuration.dump @configuration
      @backend_realtime.dump @realtime
    end