code: public static <T> KeyRange<T> greaterThan(final T start) {
      return new KeyRange<>(KeyRangeType.FORWARD_GREATER_THAN, start, null);
    }
docs: Create a {@link KeyRangeType#FORWARD_GREATER_THAN} range.
  
  @param <T>   buffer type
  @param start start key (required)
  @return a key range (never null)