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: signature_help_provider_test.rb
    path of file: ./repos/steep/test
    
    the code of the file until where you have to start completion: require_relative "test_helper"
    
  def test_send__within_block
    with_checker(<<~RBS) do
      RBS
      source = Source.parse(<<~RUBY, path: Pathname("a.rb"), factory: checker.factory)
        [1].each() do |x|
          x.zero?()
        end
      RUBY

      SignatureHelpProvider.new(source: source, subtyping: checker).tap do |provider|
        items, index = provider.run(line: 2, column: 10)
        assert_equal 0, index
        assert_equal ["() -> bool"], items.map(&:method_type).map(&:to_s)
      end
    end
  end