nl_tokens: optional
pl_tokens: function ( event , opts , fn , anyway ) { // // does not exist yet, subscribe anyway var _arguments = arguments ; var args = Object . keys ( arguments ) . map ( function ( key ) { return _arguments [ key ] } ) ; event = args . shift ( ) ; opts = args . shift ( ) ; if ( typeof opts == 'string' ) opts = { label : opts } ; if ( typeof opts == 'function' ) { fn = opts ; anyway = args . shift ( ) ; opts = { label : 'untitled' } ; } else { fn = args . shift ( ) ; anyway = args . shift ( ) ; } if ( fn . $$pipeid ) return fn . $$pipeid ; Object . defineProperty ( fn , '$$pipeid' , { enumareble : false , configurable : false , writable : false , value : generate ( ) } ) ; var base ; if ( typeof pipeline . pipes [ event ] === 'undefined' && ! anyway ) { error ( "No such event '" + event + "'" ) ; throw new Error ( "No such event '" + event + "'" ) ; } debug ( "pipeline registering handler on event '" + event + "'" ) ; ( <mask> = pipeline . pipes ) [ event ] || ( base [ event ] = [ ] ) ; pipeline . pipes [ event ] . push ( { opts : opts , fn : fn , caller : objective . getCaller ( 1 ) } ) ; return fn . $$pipeid ; }