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							- 'use strict';
 
- var hasOwn = require('./internals/has-own-property');
 
- var isArray = require('./internals/is-array');
 
- var isForced = require('./internals/is-forced');
 
- var shared = require('./internals/shared-store');
 
- var data = isForced.data;
 
- var normalize = isForced.normalize;
 
- var USE_FUNCTION_CONSTRUCTOR = 'USE_FUNCTION_CONSTRUCTOR';
 
- var ASYNC_ITERATOR_PROTOTYPE = 'AsyncIteratorPrototype';
 
- var setAggressivenessLevel = function (object, constant) {
 
-   if (isArray(object)) for (var i = 0; i < object.length; i++) data[normalize(object[i])] = constant;
 
- };
 
- module.exports = function (options) {
 
-   if (typeof options == 'object') {
 
-     setAggressivenessLevel(options.useNative, isForced.NATIVE);
 
-     setAggressivenessLevel(options.usePolyfill, isForced.POLYFILL);
 
-     setAggressivenessLevel(options.useFeatureDetection, null);
 
-     if (hasOwn(options, USE_FUNCTION_CONSTRUCTOR)) {
 
-       shared[USE_FUNCTION_CONSTRUCTOR] = !!options[USE_FUNCTION_CONSTRUCTOR];
 
-     }
 
-     if (hasOwn(options, ASYNC_ITERATOR_PROTOTYPE)) {
 
-       shared[ASYNC_ITERATOR_PROTOTYPE] = options[ASYNC_ITERATOR_PROTOTYPE];
 
-     }
 
-   }
 
- };
 
 
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