pub fn create_vhost_user_frontend(
protection_type: ProtectionType,
opt: &VhostUserFrontendOption,
connect_timeout_ms: Option<u64>,
vm_evt_wrtube: SendTube,
) -> Result<VirtioDeviceStub>pub fn create_vhost_user_frontend(
protection_type: ProtectionType,
opt: &VhostUserFrontendOption,
connect_timeout_ms: Option<u64>,
vm_evt_wrtube: SendTube,
) -> Result<VirtioDeviceStub>