OAF - Redirecting to a sub tab

Redirecting to a sub tab in OAF page by passing the SubTab id in hashmap:

HashMap hashmap = new HashMap(2); hashmap.put("porMode", "display"); 

hashmap.put("OA_SubTabIdx", 1); 

pageContext.forwardImmediately("ICX_POR_CHECKOUT_LINES", (byte)0, null, hashmap, true, null);