Function build_microvm_from_snapshot 

pub fn build_microvm_from_snapshot(
    instance_info: &InstanceInfo,
    event_manager: &mut EventManager,
    microvm_state: MicrovmState,
    guest_memory: Vec<GuestRegionMmap>,
    uffd: Option<Uffd>,
    seccomp_filters: &BpfThreadMap,
    vm_resources: &mut VmResources,
) -> Result<Arc<Mutex<Vmm>>, BuildMicrovmFromSnapshotError>

Builds and starts a microVM based on the provided MicrovmState.

An Arc reference of the built Vmm is also plugged in the EventManager, while another is returned.