34     const cbAsyncFn = callbackify(asyncFn);  constant
35     cbAsyncFn(common.mustSucceed((ret) => {
73     const cbAsyncFn = callbackify(asyncFn);  constant
74     assert.strictEqual(cbAsyncFn.length, 1);
75     assert.strictEqual(cbAsyncFn.name, 'asyncFnCallbackified');
76     cbAsyncFn(common.mustCall((err, ret) => {
155     const cbAsyncFn = callbackify(asyncFn);  constant
156     assert.strictEqual(cbAsyncFn.length, 2);
158       Object.getPrototypeOf(cbAsyncFn),
161     assert.strictEqual(Object.getPrototypeOf(cbAsyncFn), Function.prototype);
162     cbAsyncFn(value, common.mustSucceed((ret) => {