public static <T> WindowOver<T> lead(Expression<T> expr) {
        return new WindowOver<T>(expr.getType(), SQLOps.LEAD, expr);
    }
expr evaluated at the row that is one row after the current row within the partition;

@param expr expression
@return lead(expr)
querydsl-sql/src/main/java/com/querydsl/sql/SQLExpressions.java