How to cause CommandRejected event to be generated? about node-cqrs-domain HOT 5 CLOSED

module.exports = require('cqrs-domain').defineCommandHandler({
}, function (aggregateId, command, commandHandler, callback) {
    // if 'command.parentEntryId' is provided, check that the parent entity exists
    // everything else - just follow DefaultCommandHandler

    var self = this;

    var parentId = !!this.definitions.command.payload && !!command.payload.parentEntityId
        ? command.payload.parentEntityId
        : null;  // use 'dotty'

    async.waterfall([
            function (clb) {
                if (!!parentId) {
                    self.loadAggregate(command.payload.parentEntityId, clb);
                } else {
                    clb(null, null, null, false);
                }
            },
            function (aggregate, stream, isNewSnapShotNeeded, clb) {
                if (!!parentId && (!aggregate || aggregate.getRevision() === 0)) {
                    clb(// new ValidationError('Parent Entity with id: ' + parentId + ' does not exist')

                         { name: 'ValidationError', message: 'Parent Entity with id: ' + parentId + ' does not exist' }
                    );
                } else {
                    clb(null);
                }
            }
        ],
        function (err) {
            if (!!err) {
                callback(err);
            } else {
                self.workflow(aggregateId, command, callback);
            }
        }
    )
});