public static <T> KeyRange<T> atLeastBackward(final T start) {
    return new KeyRange<>(KeyRangeType.BACKWARD_AT_LEAST, start, null);
  }
public static < T > KeyRange < T > atLeastBackward ( final T start ) { return new KeyRange < > ( KeyRangeType . BACKWARD_AT_LEAST , start , null ) ; }
Create a {@link KeyRangeType#BACKWARD_AT_LEAST} range.

@param <T>   buffer type
@param start start key (required)
@return a key range (never null)