add hasChannel(), hasSubscriptionOf()

Author: MohammedSDev

src/main/java/com/hosopy/actioncable/Consumer.java

@@ -127,10 +127,19 @@ public void setStaleThresholdInSecond(int staleThresholdInSecond){
         if(connectionMonitor !=null) connectionMonitor.setStaleThresholdInSecond(staleThresholdInSecond);
     }
 
+    @Deprecated
     public boolean hasSubscription(String channel) {
         return subscriptions != null && subscriptions.hasSubscription(channel);
     }
 
+    public boolean hasChannel(String channel) {
+        return subscriptions != null && subscriptions.hasChannel(channel);
+    }
+
+    public boolean hasSubscriptionFor(String identifier) {
+        return subscriptions != null && subscriptions.hasSubscriptionOf(identifier);
+    }
+
     public Connection getConnection() {
         return connection;
     }