code: public Expression<Long> between(Long startValue, Long endValue) {
  		String valueString = "'" + startValue + "' AND '" + endValue + "'";
  		return new Expression<Long>(this, Operation.between, valueString);
  	}
docs: Method to construct the between expression for long
  
  @param startValue the start value
  @param endValue the end value
  @return Expression