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: base.rb
    path of file: ./repos/backup/lib/backup/cloud_io
    
    the code of the file until where you have to start completion: module Backup
  module CloudIO
    class Error < Backup::Error; end
    class FileSizeError < Backup::Error; end

    class Base
      attr_reader :max_retries, :retry_waitsec

      def initial
    
      def with_retries(operation)
        retries = 0
        begin
          yield
        rescue => err
          retries += 1
          raise Error.wrap(err, <<-EOS) if retries > max_retries
            Max Retries (#{max_retries}) Exceeded!
            Operation: #{operation}
            Be sure to check the log messages for each retry attempt.
          EOS

          Logger.info Error.wrap(err, <<-EOS)
            Retry ##{retries} of #{max_retries}
            Operation: #{operation}
          EOS
          sleep(retry_waitsec)
          retry
        end