public DateTimeExpression<T> min() {
        if (min == null) {
            min = Expressions.dateTimeOperation(getType(), Ops.AggOps.MIN_AGG, mixin);
        }
        return min;
    }
public DateTimeExpression < T > min ( ) { if ( min == null ) { min = Expressions . dateTimeOperation ( getType ( ) , Ops . AggOps . MIN_AGG , mixin ) ; } return min ; }
Get the minimum value of this expression (aggregation)

@return min(this)