function done( error, results ) {
		if ( error ) {
			debug( 'Encountered an error while generating a list of package dependencies: %s.', error.message );
			return clbk( error );
		}
		debug( 'Finished resolving package dependencies.' );
		clbk( null, results );
	}
Callback invoked after generating a list of package dependencies.

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