public C noWait() {
        QueryFlag noWaitFlag = configuration.getTemplates().getNoWaitFlag();
        return addFlag(noWaitFlag);
    }
With NOWAIT, the statement reports an error, rather than waiting, if a selected row cannot
be locked immediately.

@return the current object
querydsl-sql/src/main/java/com/querydsl/sql/postgresql/AbstractPostgreSQLQuery.java