nl_tokens: Indicates if file is has finished uploading and received a response
pl_tokens: function ( ) { var outstanding = <mask> ; each ( this . chunks , function ( chunk ) { var status = chunk . status ( ) ; if ( status === 'pending' || status === 'uploading' || status === 'reading' || chunk . preprocessState === 1 || chunk . readState === 1 ) { outstanding = true ; return false ; } } ) ; return ! outstanding ; }