From 0c80b1e59152eb3d8109f713c5fef746130030d0 Mon Sep 17 00:00:00 2001
From: "Mostafa A. Elbutch" <elbutchma@gmail.com>
Date: Wed, 20 Mar 2019 13:19:05 +0100
Subject: [PATCH] Avoid warnings if the result of subscribe is not used.

---
 Classes/TopicEventBus.swift | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Classes/TopicEventBus.swift b/Classes/TopicEventBus.swift
index a9ec27d..7479572 100644
--- a/Classes/TopicEventBus.swift
+++ b/Classes/TopicEventBus.swift
@@ -51,10 +51,12 @@ open class TopicEventBus: TopicEventBusType {
         }
     }
     
+    @discardableResult
     public func subscribe<T: TopicEvent>(callback: @escaping (T) -> Void) -> Listener {
         return self.subscribe(topic: nil, callback: callback)
     }
     
+    @discardableResult
     public func subscribe<T: TopicEvent>(topic: String?, callback: @escaping (T) -> Void) -> Listener {
         let className = NSStringFromClass(T.self)
         if (self.subscribers.object(forKey: className as ClassName) == nil) {