    # File lib/fog/bin/rackspace.rb, line 4
        def class_for(key)
          case key
          when :block_storage
            Fog::Rackspace::BlockStorage
          when :cdn
            Fog::CDN::Rackspace
          when :compute
            Fog::Compute::Rackspace
          when :compute_v2
            Fog::Compute::RackspaceV2
          when :storage
            Fog::Storage::Rackspace
          when :load_balancers
            Fog::Rackspace::LoadBalancers
          when :dns
            Fog::DNS::Rackspace
          when :identity
            Fog::Rackspace::Identity
          when :databases
            Fog::Rackspace::Databases
          else
            raise ArgumentError, "Unrecognized service: #{key}"
          end
        end