Added separate EventManger for FixedUpdate.

Runtime/Agoxandr.Utils.asmdef

@@ -12,11 +12,6 @@
     "autoReferenced": true,
     "defineConstraints": [],
     "versionDefines": [
-        {
-            "name": "com.unity.modules.physics",
-            "expression": "",
-            "define": "COM_UNITY_MODULES_PHYSICS"
-        },
         {
             "name": "com.unity.netcode.gameobjects",
             "expression": "",

Runtime/PhysicsEventManager.cs

@@ -0,0 +1,21 @@
+using System;
+using UnityEngine;
+
+namespace Utils
+{
+    public class PhysicsEventManager : MonoBehaviour
+    {
+        public delegate void FixedUpdateAction();
+
+        public static event FixedUpdateAction FixedUpdated;
+
+        private void FixedUpdate()
+        {
+            FixedUpdated?.Invoke();
+        }
+
+        public static Delegate[] FixedUpdateDelegates => FixedUpdated?.GetInvocationList();
+
+        public static int FixedUpdateLength => FixedUpdateDelegates?.Length ?? 0;
+    }
+}

Runtime/PhysicsEventManager.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: c65e51916058437493fa66f8382a06c6
+timeCreated: 1713872175

Runtime/TimeSince.cs

@@ -2,35 +2,27 @@ using UnityEngine;
 
 namespace Utils
 {
+    /// <summary>
+    /// https://garry.tv/timesince
+    /// </summary>
+    /// <example>
+    /// Do something after 10 seconds.
+    /// <code>
+    /// TimeSince ts;
+    /// void Start() => ts = 0;
+    /// void Update()
+    /// {
+    ///     if (ts > 10)
+    ///         Something();
+    /// }
+    /// </code>
+    /// </example>
     public struct TimeSince
     {
         private float time;
 
-        public static implicit operator float(TimeSince ts)
-        {
-            return Time.time - ts.time;
-        }
+        public static implicit operator float(TimeSince ts) => Time.time - ts.time;
 
-        public static implicit operator TimeSince(float ts)
-        {
-            return new TimeSince { time = Time.time - ts };
-        }
+        public static implicit operator TimeSince(float ts) => new() { time = Time.time - ts };
     }
-}
-
-// https://garry.tv/timesince
-
-//TimeSince ts;
-
-//void Start()
-//{
-//    ts = 0;
-//}
-
-//void Update()
-//{
-//    if (ts > 10)
-//    {
-//        DoSomethingAfterTenSeconds();
-//    }
-//}
+}