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rOACCT/node_modules/core-js/internals/ordinary-to-primitive.js
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ordinary-to-primitive.js
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			var call = require('../internals/function-call');
			var isCallable = require('../internals/is-callable');
			var isObject = require('../internals/is-object');

			var $TypeError = TypeError;

			// `OrdinaryToPrimitive` abstract operation
			// https://tc39.es/ecma262/#sec-ordinarytoprimitive
			module.exports = function (input, pref) {
			var fn, val;
			if (pref === 'string' && isCallable(fn = input.toString) && !isObject(val = call(fn, input))) return val;
			if (isCallable(fn = input.valueOf) && !isObject(val = call(fn, input))) return val;
			if (pref !== 'string' && isCallable(fn = input.toString) && !isObject(val = call(fn, input))) return val;
			throw $TypeError("Can't convert object to primitive value");
			};