// Snapshot.cs

public class Snapshot {
    readonly ushort id;
    Dictionary<byte, PlayerState> playerStates;

    public Snapshot(InPacket packet) {
        // ...code...
        ReadSnapshot(packet);
    }

    public void ReadSnapshot(InPacket packet) {
        // ...code...
        GameManager.Instance.UpdateEntity(entityId, entity);
    }
}

// NetClient.cs

public class NetClient : GameSocket {
    // ... various members, constructors, methods ...

    private bool OnReceive(InPacket packet) {
        // ...code...
        sequences.Put(packet.Sequence);
        //...code...
    }
}

// GameSocket.cs

public class GameSocket {
    // ... code ...
}

// GameManager.cs

public class GameManager : MonoBehaviour
{
    private static GameManager instance;
    public static GameManager Instance { get => instance; }

    private GameObject netPlayerCharacter;

    // ...code...

    private void Awake() {
        if (instance != null && instance != this) {
            Debug.LogWarning("GameObject instance destroyed.");
            Destroy(this.gameObject);
        } else {
            instance = this;
        }

        netPlayerCharacter = GameObject.Find("NetworkPlayerCharacter");
        Debug.Log(netPlayerCharacter.name);

        client = new NetClient(SERVER_IP, SERVER_PORT);
        client.Connect();
    }

    public void UpdateEntity(byte entityId, PlayerState entity) {
        Debug.Log("this line gets printed, the next one doesn't");
        Debug.Log(netPlayerCharacter.name);
    }
}