function onDir( error, contents ) { // eslint-disable-line no-unused-vars
			if ( error ) {
				if (
					error.code === 'ENOENT' ||
					error.code === 'ENOTDIR'
				) {
					// Return a `404` response...
					return notFound( response );
				}
				// TODO
			}
			// TODO
		}
Callback invoked after reading a directory's contents.

@private
@param {(Error|null)} error - error object
@param {StringArray} contents - directory contents
@returns {void}