Function clone

CustomerManager/Scripts/breeze.debug.js:11736–11764

(that, propName, value)

        // private functions

        function clone(that, propName, value) {
            // immutable queries mean that we don't need to clone if no change in value.
            if (propName) {
                if (that[propName] === value) return that;
            }
            // copying QueryOptions is safe because they are are immutable;
            var copy = __extend(new EntityQuery(), that, [
              "resourceName",
              "fromEntityType",
              "wherePredicate",
              "orderByClause",
              "selectClause",
              "skipCount",
              "takeCount",
              "expandClause",
              "inlineCountEnabled",
              "noTrackingEnabled",
              "usesNameOnServer",
              "queryOptions",
              "entityManager",
              "dataService",
              "resultEntityType"
            ]);
            copy.parameters = __extend({}, that.parameters);
            if (propName) {
                copy[propName] = value;
            }
            return copy;
        }

        function processUsing(eq, map, value, propertyName) {
            var typeName = value._$typeName || (value.parentEnum && value.parentEnum.name);