Issue #326

Author: gondor

core/src/main/java/org/openstack4j/model/storage/block/builder/VolumeBuilder.java

@@ -83,4 +83,13 @@ public interface VolumeBuilder extends Builder<VolumeBuilder, Volume> {
 	 * @return VolumeBuilder
 	 */
 	VolumeBuilder metadata(Map<String, String> metadata);
+	
+	/**
+     * The associated availability zone. <b>Optional</b>
+     * 
+     * @param zone The associated availability zone.
+     * @return VolumeBuilder
+     */
+    VolumeBuilder zone(String zone);
+	
 }

core/src/main/java/org/openstack4j/openstack/storage/block/domain/CinderVolume.java

@@ -298,5 +298,11 @@ public VolumeBuilder from(Volume in) {
 			m = (CinderVolume) in;
 			return this;
 		}
+
+        @Override
+        public VolumeBuilder zone(String zone) {
+            m.zone = zone;
+            return this;
+        }
 	}
 }