'use strict'; 
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var hasOwn = require('../internals/has-own-property'); 
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var defineBuiltIn = require('../internals/define-built-in'); 
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var dateToPrimitive = require('../internals/date-to-primitive'); 
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var wellKnownSymbol = require('../internals/well-known-symbol'); 
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var TO_PRIMITIVE = wellKnownSymbol('toPrimitive'); 
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var DatePrototype = Date.prototype; 
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// `Date.prototype[@@toPrimitive]` method 
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// https://tc39.es/ecma262/#sec-date.prototype-@@toprimitive 
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if (!hasOwn(DatePrototype, TO_PRIMITIVE)) { 
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  defineBuiltIn(DatePrototype, TO_PRIMITIVE, dateToPrimitive); 
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} 
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