Function __using

CustomerManager/Scripts/breeze.debug.js:448–463

(obj, property, tempValue, fn)

    }

    function __using(obj, property, tempValue, fn) {
        var originalValue = obj[property];
        if (tempValue === originalValue) {
            return fn();
        }
        obj[property] = tempValue;
        try {
            return fn();
        } finally {
            if (originalValue === undefined) {
                delete obj[property];
            } else {
                obj[property] = originalValue;
            }
        }
    }

    function __wrapExecution(startFn, endFn, fn) {
        var state;