--- a
+++ b/Workbench/src/de/kuei/metafora/gwt/smack/client/groupMembers/GroupMemberListener.java
@@ -0,0 +1,14 @@
+package de.kuei.metafora.gwt.smack.client.groupMembers;
+
+import java.util.Vector;
+
+import com.google.gwt.user.client.rpc.RemoteService;
+import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
+
+@RemoteServiceRelativePath("groupmemberlistener")
+public interface GroupMemberListener extends RemoteService{
+	public void setGroupMembers(String group, Vector<String> user);
+	public void addGroupMember(String group, String user);
+	public String getGroupMembers(String group);
+	public void removeGroupMember(String user);
+}