# File lib/delayed/worker.rb, line 64
    def self.backend=(backend)
      if backend.is_a? Symbol
        require "delayed/serialization/#{backend}"
        require "delayed/backend/#{backend}"
        backend = "Delayed::Backend::#{backend.to_s.classify}::Job".constantize
      end
      @@backend = backend # rubocop:disable ClassVars
      silence_warnings { ::Delayed.const_set(:Job, backend) }
    end