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: test_emitter.rb
    path of file: ./repos/psych/test/psych
    
    the code of the file until where you have to start completion: # -*- coding: utf-8 -*-
# frozen_string_literal: true

require_relative 'helper'

module Psych
  class TestEmitter < TestCase
    def setup
      super
      @out = StringIO.new(''.dup)
    
    
    def test_resizing_tags
      @emitter.start_stream Psych::Nodes::Stream::UTF8

      tags = []
      version = [1,1]
      obj = Object.new
      obj.instance_variable_set(:@tags, tags)
      def obj.to_str
        (1..10).map{|x| @tags.push(["AAAA","BBBB"])}
        return "x"
      end

      tags.push([obj, "tag:TALOS"])
      @emitter.start_document(version, tags, 0)
      assert(true)
    end