set_association_collection_records

# File activerecord/lib/active_record/association_preload.rb, line 142
      def set_association_collection_records(id_to_record_map, reflection_name, associated_records, key)
        associated_records.each do |associated_record|
          mapped_records = id_to_record_map[associated_record[key].to_s]
          add_preloaded_records_to_collection(mapped_records, reflection_name, associated_record)
        end
      end