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: worker.rb
    path of file: ./repos/karafka/lib/karafka/processing
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Karafka
  module Processing
    # Workers are used to run jobs in separate threads.
    # Workers are the main processing units of the Karafka framework.
    #
    # Each job runs in three stages:
    #   - prepare - here we can run any code that we would need to run blocking before we allow
    #               the job to run fully async (non blocking). This will always run in a blocking
    #               way and can be used to make sure all the resources and external dependencies
    #               are satisfied before going async.
    #
    #   - call - actual processing logic that can run sync or async
    #
    #   - teardown - it should include any code that we want to run after we executed the user
    #                code. This can be used to unlock certain resources or do other things that are
    #                not user code but need to run after user code base is executed.
    class Worker
      include Helpers::Async

      # @return [String] id of this worker
      attr_reader :id

      # @param jobs_queue [JobsQueue]
      # @return [Worker]
      def ini
    
      def process
        job = @jobs_queue.pop

        instrument_details = { caller: self, job: job, jobs_queue: @jobs_queue }

        if job
          Karafka.monitor.instrument('worker.process', instrument_details)

          Karafka.monitor.instrument('worker.processed', instrument_details) do
            job.before_call

            # If a job is marked as non blocking, we can run a tick in the job queue and if there
            # are no other blocking factors, the job queue will be unlocked.
            # If this does not run, all the things will be blocking and job queue won't allow to
            # pass it until done.
            @jobs_queue.tick(job.group_id) if job.non_blocking?

            job.call

            job.after_call

            true
          end
        else
          false
        end
      # We signal critical exceptions, notify and do not allow worker to fail
      # rubocop:disable Lint/RescueException
      rescue Exception => e
        # rubocop:enable Lint/RescueException
        Karafka.monitor.instrument(
          'error.occurred',
          caller: self,
          job: job,
          jobs_queue: @jobs_queue,
          error: e,
          type: 'worker.process.error'
        )
      ensure
        # job can be nil when the queue is being closed
        if job
          @jobs_queue.complete(job)
          job.finish!
        end

        # Always publish info, that we completed all the work despite its result
        Karafka.monitor.instrument('worker.completed', instrument_details)
      end
    end