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: engine.rb
    path of file: ./repos/dd-trace-rb/lib/datadog/appsec/reactive
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

requi
    
        def publish(address, value)
          # check if someone has address subscribed
          if @subscribers.addresses.include?(address)

            # someone will be interested, set value
            @data[address] = value

            # find candidates i.e address groups that contain the just posted address
            @subscribers.with(address).each do |addresses|
              # find targets to the address group containing the posted address
              subscribers = @subscribers[addresses]

              # is all data for the targets available?
              if (addresses - @data.keys).empty?
                hash = addresses.each_with_object({}) { |a, h| h[a] = @data[a] }
                subscribers.each { |s| s.call(*hash.values) }
              end
            end