src/main/java/com/seanchenxi/gwt/storage/client/StorageExt.java
public static StorageExt getSessionStorage() {
    if (sessionStorage == null && Storage.isSessionStorageSupported()) {
      sessionStorage = new StorageExt(Storage.getSessionStorageIfSupported());
    }
    return sessionStorage;
  }
public static StorageExt getSessionStorage() {
    if (sessionStorage == null && Storage.isSessionStorageSupported()) {
      sessionStorage = new StorageExt(Storage.getSessionStorageIfSupported());
    }
    return sessionStorage;
  }
Returns a Session Storage.

@return the sessionStorage instance, or <code>null</code> if Web Storage is NOT supported.