@Override
    public DateTimeExpression<T> max() {
        if (max == null) {
            max = Expressions.dateTimeOperation(getType(), Ops.AggOps.MAX_AGG, mixin);
        }
        return max;
    }
Get the maximum value of this expression (aggregation)

@return max(this)
querydsl-core/src/main/java/com/querydsl/core/types/dsl/DateTimeExpression.java