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1const util = require('util');
2const assert = require('assert');
3
4class deprecatedClass {
5}
6
7const deprecated = util.deprecate(deprecatedClass, 'deprecatedClass is deprecated.');
8
9const instance = new deprecated();
10const deprecatedInstance = new deprecatedClass();
11
12assert(instance instanceof deprecated);
13assert(instance instanceof deprecatedClass);
14assert(deprecatedInstance instanceof deprecated);
15assert(deprecatedInstance instanceof deprecatedClass);
16