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: slave.rb
    path of file: ./repos/arachni/lib/arachni/rpc/server/framework
    
    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

module Arachni
class RPC::Server::Framework

# Holds methods for slave Instances.
#
# @author Tasos "Zapotek" Laskos <tasos.laskos@arachni-scanner.com>
module Slave

    # Sets the URL and authentication token required to connect to this
    # Instance's master and makes this Instance a slave.
    #
    # @param    [String]    url
    #   Master's URL in `hostname:port` form.
    # @param    [String]    token
    #   Master's authentication token.
    #
    # @return   [Bool]
    #   `true` on success, `false` if the instance is already part of a
    #   multi-Instance operation.
    #
    # @private
    def set_master( url, token )
        # If we're already a member of a mu
    
    def set_master( url, token )
        # If we're already a member of a multi-Instance operation bail out.
        return false if !solo?

        options.scope.do_not_crawl

        # Make sure the desired plugins are loaded before #prepare runs them.
        plugins.load options.plugins if options.plugins

        # Start the clock and run the plugins.
        prepare

        Thread.new { browser_cluster }

        @master = connect_to_instance( url: url, token: token )

        # Buffer for logged issues that are to be sent to the master.
        @issue_buffer = []

        # Don't store issues locally -- will still filter duplicate issues though.
        Data.issues.do_not_store

        # Buffer discovered issues...
        Data.issues.on_new do |issue|
            @issue_buffer << issue
        end
        # ... and flush it on each page audit.
        after_page_audit do
            sitrep( issues: @issue_buffer.dup )
            @issue_buffer.clear
        end

        print_status "Enslaved by: #{url}"

        true
    end