diff --git a/src/main/java/org/gcube/datatransfer/resolver/services/StorageHubResolver.java b/src/main/java/org/gcube/datatransfer/resolver/services/StorageHubResolver.java
index 8956345..ed1b12d 100644
--- a/src/main/java/org/gcube/datatransfer/resolver/services/StorageHubResolver.java
+++ b/src/main/java/org/gcube/datatransfer/resolver/services/StorageHubResolver.java
@@ -1,5 +1,7 @@
 package org.gcube.datatransfer.resolver.services;
 
+import static org.gcube.common.storagehub.model.Constants.versionPrefix;
+
 import javax.enterprise.context.RequestScoped;
 import javax.servlet.http.HttpServletRequest;
 import javax.ws.rs.GET;
@@ -10,15 +12,12 @@ import javax.ws.rs.core.Context;
 import javax.ws.rs.core.Response;
 
 import org.gcube.common.storagehub.client.StreamDescriptor;
-import org.gcube.common.storagehub.client.dsl.StorageHubClient;
 import org.gcube.common.storagehub.client.plugins.AbstractPlugin;
 import org.gcube.common.storagehub.client.proxies.ItemManagerClient;
-import org.gcube.common.storagehub.client.proxies.WorkspaceManagerClient;
 import org.gcube.datatransfer.resolver.services.error.ExceptionManager;
 import org.gcube.smartgears.utils.InnerMethodName;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import static org.gcube.common.storagehub.model.Constants.*;
 
 /**
  * The Class StorageHubResolver.