Moved a couple of folders and wrote some code

Assets/Packages/FishNet/Runtime/Broadcast/Helping.meta

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Assets/Packages/FishNet/Runtime/Broadcast/Helping/BroadcastHelper.cs

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+using FishNet.Object.Helping;
+
+namespace FishNet.Broadcast.Helping
+{
+    internal static class BroadcastHelper
+    {
+        /// <summary>
+        /// Gets the key for a broadcast type.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="broadcastType"></param>
+        /// <returns></returns>
+        public static ushort GetKey<T>()
+        {
+            return typeof(T).FullName.GetStableHash16();
+        }
+    }
+
+}

Assets/Packages/FishNet/Runtime/Broadcast/Helping/BroadcastHelper.cs.meta

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Assets/Packages/FishNet/Runtime/Broadcast/IBroadcast.cs

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+
+namespace FishNet.Broadcast
+{
+    /// <summary>
+    /// Include this interface on types intended to be used with Broadcast.
+    /// </summary>
+    public interface IBroadcast { }
+}

Assets/Packages/FishNet/Runtime/Broadcast/IBroadcast.cs.meta

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