ENUM
Supported in v5.0+ VFD host install state.
enum HostVfdState {HOST_VFD_STATE_INSTALLEDHOST_VFD_STATE_INSTALLED_BUT_RESTART_REQUIREDHOST_VFD_STATE_INSTALLED_BUT_TWO_RESTARTS_REQUIREDHOST_VFD_STATE_NOT_INSTALLEDHOST_VFD_STATE_UNINSTALLED_BUT_RESTART_REQUIRED}