public static <E extends Comparable<? super E>> AbstractGroupExpression<E, E> min(Expression<E> expression) {
        return new GMin<E>(expression);
    }
Create a new aggregating min expression

@param expression expression for which the minimum value will be used in the group by projection
@return wrapper expression
querydsl-core/src/main/java/com/querydsl/core/group/GroupBy.java