Added missing ToString and DebuggerDisplays

src/Discord.Net.Rest/Entities/Channels/RestVoiceChannel.cs

@@ -2,7 +2,6 @@
 using Discord.Audio;
 using System;
 using System.Collections.Generic;
-using System.Collections.Immutable;
 using System.Diagnostics;
 using System.Linq;
 using System.Threading.Tasks;
@@ -37,6 +36,8 @@ namespace Discord.Rest
         public Task ModifyAsync(Action<ModifyVoiceChannelParams> func)
             => ChannelHelper.ModifyAsync(this, Discord, func);
 
+        private string DebuggerDisplay => $"{Name} ({Id}, Voice)";
+
         //IVoiceChannel
         Task<IAudioClient> IVoiceChannel.ConnectAsync() { throw new NotSupportedException(); }