Added separate EventManger for FixedUpdate.

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();
-//    }
-//}
+}