code: private static void addIfNotNullOrEmpty(UriQueryBuilder builder, String name, String val) throws StorageException {
          if (!Utility.isNullOrEmpty(val)) {
              builder.add(name, val);
          }
      }
docs: Helper to add a name/value pair to a <code>UriQueryBuilder</code> if the value is not null or empty.
  
  @param builder
  The builder to add to.
  @param name
  The name to add.
  @param val
  The value to add if not null or empty.
  
  @throws StorageException
  An exception representing any error which occurred during the operation.