public NumberExpression<T> round() {
        if (round == null) {
            round = Expressions.numberOperation(getType(), MathOps.ROUND, mixin);
        }
        return round;
    }
Create a {@code round(this)} expression

<p>Returns the closest {@code int} to this.</p>

@return round(this)
@see java.lang.Math#round(double)
@see java.lang.Math#round(float)
querydsl-core/src/main/java/com/querydsl/core/types/dsl/NumberExpression.java