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: lookup_tables.rb
    path of file: ./repos/hyperstack/ruby/hyper-model/lib/reactive_record/active_record/reactive_record
    
    the code of the file until where you have to start completion: module ReactiveRecord
  module LookupTables
    def initialize_lookup_tables
      @records = Hash.new { |hash, key| hash[key] = [] }
      @records_b
    
    def initialize_lookup_tables
      @records = Hash.new { |hash, key| hash[key] = [] }
      @records_by_id = `{}`
      @records_by_vector = `{}`
      @records_by_object_id = `{}`
      @class_scopes = Hash.new { |hash, key| hash[key] = {} }
      @waiting_for_save = Hash.new { |hash, key| hash[key] = [] }
    end