teardown_shared_connection_pool

# File activerecord/lib/active_record/test_fixtures.rb, line 242
      def teardown_shared_connection_pool
        if ActiveRecord::Base.legacy_connection_handling
          @legacy_saved_pool_configs.each_pair do |handler, names|
            names.each_pair do |name, shards|
              shards.each_pair do |shard_name, pool_config|
                pool_manager = handler.send(:owner_to_pool_manager)[name]
                pool_manager.set_pool_config(nil, shard_name, pool_config)
              end
            end
          end
        else
          handler = ActiveRecord::Base.connection_handler

          @saved_pool_configs.each_pair do |name, shards|
            pool_manager = handler.send(:owner_to_pool_manager)[name]
            shards.each_pair do |shard_name, roles|
              roles.each_pair do |role, pool_config|
                next unless pool_manager.get_pool_config(role, shard_name)

                pool_manager.set_pool_config(role, shard_name, pool_config)
              end
            end
          end
        end

        @legacy_saved_pool_configs.clear
        @saved_pool_configs.clear
      end