mine/node_modules/core-js/modules/es.date.to-primitive.js

'use strict';
var hasOwn = require('../internals/has-own-property');
var defineBuiltIn = require('../internals/define-built-in');
var dateToPrimitive = require('../internals/date-to-primitive');
var wellKnownSymbol = require('../internals/well-known-symbol');

var TO_PRIMITIVE = wellKnownSymbol('toPrimitive');
var DatePrototype = Date.prototype;

// `Date.prototype[@@toPrimitive]` method
// https://tc39.es/ecma262/#sec-date.prototype-@@toprimitive
if (!hasOwn(DatePrototype, TO_PRIMITIVE)) {
  defineBuiltIn(DatePrototype, TO_PRIMITIVE, dateToPrimitive);
}