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: systemd_common.rb
    path of file: ./repos/manageiq/app/models/miq_worker
    
    the code of the file until where you have to start completion: class MiqWorker
  module SystemdCommon
    extend ActiveSupport::Concern

    class_methods do
      def service_base_name
        "manageiq-#{minimal_class_name.underscore.tr("/", "_")}"
      end

      def service_file
        "#{service_base_name}@.service"
      end

      def target_fi
    
    def unit_config_file
      # Override this in a sub-class if the specific instance needs
      # any additional config
      <<~UNIT_CONFIG_FILE
        [Service]
        MemoryHigh=#{worker_settings[:memory_threshold].bytes}
        TimeoutStartSec=#{worker_settings[:starting_timeout]}
        TimeoutStopSec=#{worker_settings[:stopping_timeout]}
        WatchdogSec=#{worker_settings[:heartbeat_timeout]}
        #{unit_environment_variables.map { |env_var| "Environment=#{env_var}" }.join("\n")}
      UNIT_CONFIG_FILE
    end