Exposed the ServiceLocator of the MonoService as a protected member.

Runtime/MonoService.cs

@@ -1,11 +1,13 @@
 using System;
 using UnityEngine;
+using UnityEngine.Serialization;
 
 namespace Nonatomic.ServiceLocator
 {
 	public abstract class MonoService<T> : MonoBehaviour where T : class
 	{
-		[SerializeField] private ServiceLocator _serviceLocator;
+		[FormerlySerializedAs("_serviceLocator")] 
+		[SerializeField] protected ServiceLocator ServiceLocator;
 
 		protected virtual void Awake()
 		{
@@ -14,12 +16,12 @@ protected virtual void Awake()
 				throw new InvalidOperationException($"{GetType().Name} must implement the {typeof(T).Name} interface.");
 			}
 
-			_serviceLocator.Register<T>(this as T);
+			ServiceLocator.Register<T>(this as T);
 		}
 
 		protected virtual void OnDestroy()
 		{
-			_serviceLocator.Unregister<T>();
+			ServiceLocator.Unregister<T>();
 		}
 	}
 }