nl_tokens: The dataset client record object
pl_tokens: function doListDatasetClients ( filter , cb ) { debug ( 'doListDatasetClients' ) ; var col = mongoClient . collection ( DATASETCLIENTS_COLLECTION ) ; col . find ( <mask> ) . toArray ( function ( err , datasetClients ) { if ( err ) { debugError ( 'Failed to list datasetClients due to error %s' , err ) ; } return cb ( err , datasetClients ) ; } ) ; }