Add convenience method to add supported OpSet

src/net/java/sip/communicator/service/contactsource/ContactDetail.java

@@ -428,6 +428,21 @@ public void setSupportedOpSets(
         this.supportedOpSets = supportedOpSets;
     }
 
+    /**
+     * Adds a supported OpSet to the list of supported OpSets.
+     * @param supportedOpSet the OpSet to support.
+     */
+    public void addSupportedOpSet(Class<? extends OperationSet> supportedOpSet)
+    {
+        if (this.supportedOpSets == null)
+        {
+            this.supportedOpSets
+                = new ArrayList<Class<? extends OperationSet>>(2);
+        }
+
+        this.supportedOpSets.add(supportedOpSet);
+    }
+
     /**
      * Gets the category, if any, of this <tt>ContactQuery</tt>.
      *