findModelFixtures(modelName, matchExpr) {
        const foundModel = _.cloneDeep(this.findModelFixture(modelName));
        foundModel.entries = _.filter(foundModel.entries, matchExpr);
        return foundModel;
    }
### Find Model Fixtures
Find a  model fixture name & a matching expression for the FILTER function
@param {String} modelName
@param {String|Object|Function} matchExpr
@returns {Object} model fixture