player/js/utils/expressions/PropertyInterface.js

var PropertyInterface = (function() {
    return function(propertyName, propertyGroup) {

        var interfaceFunction = {
            _name: propertyName
        }

        function _propertyGroup(val){
            val = val === undefined ? 1 : val
            if(val <= 0){
                return interfaceFunction;
            } else {
                return propertyGroup(--val);
            }
        }

        return _propertyGroup;
    }
}())