# File lib/vagrant-libvirt/config.rb, line 164
      def initialize
        @uri               = UNSET_VALUE
        @driver            = UNSET_VALUE
        @host              = UNSET_VALUE
        @connect_via_ssh   = UNSET_VALUE
        @username          = UNSET_VALUE
        @password          = UNSET_VALUE
        @id_ssh_key_file   = UNSET_VALUE
        @storage_pool_name = UNSET_VALUE
        @random_hostname   = UNSET_VALUE
        @management_network_device  = UNSET_VALUE
        @management_network_name    = UNSET_VALUE
        @management_network_address = UNSET_VALUE
        @management_network_mode = UNSET_VALUE
        @management_network_mac  = UNSET_VALUE
        @management_network_guest_ipv6 = UNSET_VALUE
        @management_network_autostart = UNSET_VALUE
        @management_network_pci_slot = UNSET_VALUE
        @management_network_pci_bus = UNSET_VALUE

        # System connection information
        @system_uri      = UNSET_VALUE

        # Domain specific settings.
        @uuid              = UNSET_VALUE
        @memory            = UNSET_VALUE
        @memory_backing    = UNSET_VALUE
        @cpus              = UNSET_VALUE
        @cpu_mode          = UNSET_VALUE
        @cpu_model         = UNSET_VALUE
        @cpu_fallback      = UNSET_VALUE
        @cpu_features      = UNSET_VALUE
        @cpu_topology      = UNSET_VALUE
        @features          = UNSET_VALUE
        @features_hyperv   = UNSET_VALUE
        @numa_nodes        = UNSET_VALUE
        @loader            = UNSET_VALUE
        @nvram             = UNSET_VALUE
        @machine_type      = UNSET_VALUE
        @machine_arch      = UNSET_VALUE
        @machine_virtual_size = UNSET_VALUE
        @disk_bus          = UNSET_VALUE
        @disk_device       = UNSET_VALUE
        @nic_model_type    = UNSET_VALUE
        @nested            = UNSET_VALUE
        @volume_cache      = UNSET_VALUE
        @kernel            = UNSET_VALUE
        @initrd            = UNSET_VALUE
        @dtb               = UNSET_VALUE
        @cmd_line          = UNSET_VALUE
        @emulator_path     = UNSET_VALUE
        @graphics_type     = UNSET_VALUE
        @graphics_autoport = UNSET_VALUE
        @graphics_port     = UNSET_VALUE
        @graphics_ip       = UNSET_VALUE
        @graphics_passwd   = UNSET_VALUE
        @video_type        = UNSET_VALUE
        @video_vram        = UNSET_VALUE
        @sound_type        = UNSET_VALUE
        @keymap            = UNSET_VALUE
        @kvm_hidden        = UNSET_VALUE

        @tpm_model         = UNSET_VALUE
        @tpm_type          = UNSET_VALUE
        @tpm_path          = UNSET_VALUE

        @nic_adapter_count = UNSET_VALUE

        # Boot order
        @boot_order        = []
        # Storage
        @disks             = []
        @cdroms            = []

        # Inputs
        @inputs            = UNSET_VALUE

        # Channels
        @channels          = UNSET_VALUE

        # PCI device passthrough
        @pcis              = UNSET_VALUE

        # Random number device passthrough
        @rng = UNSET_VALUE

        # Watchdog device
        @watchdog_dev      = UNSET_VALUE

        # USB controller
        @usbctl_dev        = UNSET_VALUE

        # USB device passthrough
        @usbs              = UNSET_VALUE

        # Redirected devices
        @redirdevs         = UNSET_VALUE
        @redirfilters      = UNSET_VALUE

        # smartcard device
        @smartcard_dev     = UNSET_VALUE

        # Suspend mode
        @suspend_mode      = UNSET_VALUE

        # Autostart
        @autostart         = UNSET_VALUE

        # Attach mgmt network
        @mgmt_attach       = UNSET_VALUE

        @qemu_args  = []
        @qemu_use_session  = UNSET_VALUE
      end