nl_tokens: / * this is nice but maybe too lengthy
pl_tokens: function _p ( prop , <mask> ) { if ( ! props . hasOwnProperty ( prop ) ) { return ; } if ( arguments . length === 1 ) { // get return Env . can ( 'define_property' ) ? props [ prop ] : self [ prop ] ; } else { // set if ( Env . can ( 'define_property' ) ) { props [ prop ] = value ; } else { self [ prop ] = value ; } } }