es.regexp.sticky.js
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es.regexp.sticky.js
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	var DESCRIPTORS = require('../internals/descriptors');
	var UNSUPPORTED_Y = require('../internals/regexp-sticky-helpers').UNSUPPORTED_Y;
	var defineProperty = require('../internals/object-define-property').f;
	var getInternalState = require('../internals/internal-state').get;
	var RegExpPrototype = RegExp.prototype;

	// `RegExp.prototype.sticky` getter
	// https://tc39.es/ecma262/#sec-get-regexp.prototype.sticky
	if (DESCRIPTORS && UNSUPPORTED_Y) {
	defineProperty(RegExp.prototype, 'sticky', {
	configurable: true,
	get: function () {
	if (this === RegExpPrototype) return undefined;
	// We can't use InternalStateModule.getterFor because
	// we don't add metadata for regexps created by a literal.
	if (this instanceof RegExp) {
	return !!getInternalState(this).sticky;
	}
	throw TypeError('Incompatible receiver, RegExp required');
	}
	});
	}