PR-URL: https://github.com/nodejs/node/pull/4538
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
[`util.inherits`][] method is particularly helpful for this.)
2. Call the appropriate parent class constructor in your constructor,
to be sure that the internal mechanisms are set up properly.
-2. Implement one or more specific methods, as detailed below.
+3. Implement one or more specific methods, as detailed below.
The class to extend and the method(s) to implement depend on the sort
of stream class you are writing: