nl_tokens: attempt to send another obj in the stream at the end
pl_tokens: function trailer ( file , fn ) { return through ( { objectMode : true } , function ( a , e , cb ) { this . push ( a ) cb ( ) } , function ( cb ) { var self = this fn ( function ( err , val ) { if ( err ) { return cb ( err ) } if ( val ) { if ( typeof val === 'string' ) { val = new <mask> ( string ) } var f = new File ( { path : file , contents : val } ) self . push ( f ) } cb ( ) } ) } ) }