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: config_scanning.rb
    path of file: ./repos/newrelic-ruby-agent/test/helpers
    
    the code of the file until where you have to start completion: # This file is distributed under New Relic's license terms.
# See https://github.com/newrelic/newrelic-ruby-agent/blob/main/LICENSE for complete details.
# frozen_string_literal: true

module NewRelic
  module TestHelpers
    module ConfigScanning
      # This is a bit loose (allows any config[] with the right key) so we can pass
      # NewRelic::Agent.config into classes as long as we call the variable config
      AGENT_CONFIG_PATTERN = /config\[:(['"])?([a-z\._]+)\1?\s*\]/
      DEFAULT_VALUE_OF_PATTERN = /:default\s*=>\s*value_of\(:(['"])?([a-z\._]+)\1?\)\s*/
      DEFAULT_INST_VALUE_OF_PATTERN = /:default\s*=>\s*instrumentation_value_of\(:(['"])?([a-z._]+)\1?\)|\(:(['"])?([a-z._]+)\3?\s*,\s*:(['"])?([a-z._]+)\5?\)/
      REGISTER_CALLBACK_PATTERN = /register_callback\(:(['"])?([a-z\._]+)\1?\)/
      NAMED_DEPENDENCY_PATTERN = /^\s*named[ (]+\:?([a-z0-9\._]+).*$/
      EVENT_BUFFER_MACRO_PATTERN = /(capacity_key|enabled_key)\s+:(['"])?([a-z\._]+)\2?/
      ASSIGNED_CONSTANT_PATTERN = /[A-Z]+\s*=\s*:(['"])?([a-z\._]+)\1?\s*/

      def scan_and_remove_used_entries(default_keys, non_test_files)
        non_test_files.each do |file|
          lines_in(
    
      def scan_and_remove_used_entries(default_keys, non_test_files)
        non_test_files.each do |file|
          lines_in(file).each do |line|
            captures = []
            captures << line.scan(AGENT_CONFIG_PATTERN)
            captures << line.scan(DEFAULT_VALUE_OF_PATTERN)
            captures << line.scan(DEFAULT_INST_VALUE_OF_PATTERN)
            captures << line.scan(REGISTER_CALLBACK_PATTERN)
            captures << line.scan(EVENT_BUFFER_MACRO_PATTERN)
            captures << line.scan(ASSIGNED_CONSTANT_PATTERN)
            captures << line.scan(NAMED_DEPENDENCY_PATTERN).map(&method(:disable_name))

            captures.flatten.compact.each do |key|
              default_keys.delete(key.delete("'").to_sym)
            end

            # Remove any config keys that are annotated with the 'dynamic_name' setting
            # This indicates that the names of these keys are constructed dynamically at
            # runtime, so we don't expect any explicit references to them in code.
            default_keys.delete_if do |key_name|
              NewRelic::Agent::Configuration::DEFAULTS[key_name][:dynamic_name]
            end
          end
        end
      end

      private

      def disable_name(names)
        names.map { |name| "disable_#{name}" }
      end

      def lines_in(file)
        File.read(file).split("\n")
      end
    end