nl_tokens: e . g . shelljs_a5f185d0443ca ...
pl_tokens: function randomFileName ( ) { function randomHash ( <mask> ) { if ( count === 1 ) return parseInt ( 16 * Math . random ( ) , 10 ) . toString ( 16 ) ; else { var hash = '' ; for ( var i = 0 ; i < count ; i ++ ) hash += randomHash ( 1 ) ; return hash ; } } return 'shelljs_' + randomHash ( 20 ) ; }