function done( error, errs ) {
		var i;
		if ( error ) {
			return clbk( error );
		}
		if ( errs ) {
			for ( i = 0; i < errs.length; i++ ) {
				errs[ i ].namespace = pkgs[ idx ].id;
				results.push( errs[ i ] );
			}
		}
		debug( 'Finished linting %d of %d namespaces.', idx+1, total );
		if ( idx === total-1 ) {
			debug( 'Finished linting.' );
			return clbk( null, results );
		}
		next();
	}
Callback invoked upon linting a namespace.

@private
@param {(Error|null)} error - error object
@param {ObjectArray} [errs] - lint errors
@returns {void}