Added GetPrecondition<TPrecondition>() to ModuleInfo and CommandInfo

src/Discord.Net.Commands/Info/CommandInfo.cs

@@ -63,6 +63,9 @@ namespace Discord.Commands
             _action = builder.Callback;
         }
 
+        public TPrecondition GetPrecondition<TPrecondition>() where TPrecondition : PreconditionAttribute =>
+            Preconditions.FirstOrDefault(x => x is TPrecondition) as TPrecondition;
+
         public async Task<PreconditionResult> CheckPreconditionsAsync(ICommandContext context, IDependencyMap map = null)
         {
             if (map == null)

src/Discord.Net.Commands/Info/ModuleInfo.cs

@@ -20,6 +20,9 @@ namespace Discord.Commands
         public ModuleInfo Parent { get; }
         public bool IsSubmodule => Parent != null;
 
+        public TPrecondition GetPrecondition<TPrecondition>() where TPrecondition : PreconditionAttribute =>
+            Preconditions.FirstOrDefault(x => x is TPrecondition) as TPrecondition;
+
         internal ModuleInfo(ModuleBuilder builder, CommandService service, ModuleInfo parent = null)
         {
             Service = service;