nl_tokens: Registers a listener of the specified message . Whenever the specified message is sent the specified callBack function will be invoked passing the parameters specified in the send invocation
pl_tokens: function listen ( name , callBack ) { function f ( ) { try { callBack . <mask> ( this , arguments ) ; } catch ( e ) { console . error ( e ) ; // eslint-disable-line no-console } } callbacks [ callBack ] = f ; messageBus . bind ( name , f ) ; }