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: xss_script_context.rb
    path of file: ./repos/arachni/components/checks/active
    
    the code of the file until where you have to start completion: =begin
    Copyright 2010-2022 Ecsypno <http://www.ecsypno.com>

    This file is part of the Arachni Framework project and is subject to
    redistribution and commercial restrictions. Please see the Arachni Framework
    web site for more information on licensing and terms of use.
=end

# Injects JS taint code and checks to see if it gets executed as proof of
# vulnerability
    
    def self.check_browser_result( result, element, referring_page, cluster )
        page = result.page

        print_info 'Checking results of deferred taint analysis for' <<
                       ' execution-flow sink data.'

        return if page.dom.execution_flow_sinks.empty?

        log(
            vector:         element,
            proof:          element.seed,
            page:           page,
            referring_page: referring_page
        )
    end