nl_tokens: Override request process so it first fetches the data needed for a page transition .
pl_tokens: function ( req , cb ) { req = request . normalizeRequest ( req ) ; var page ; try { page = this . createPageForRequest ( req ) ; } catch ( err ) { if ( cb ) return cb ( err ) else throw err ; } var needData = typeof page . fetchData === 'function' && ! this . state . request . data ; if ( request . isEqual ( this . state . request , req ) && ! needData ) return ; fetchDataForRequest ( this , page , req , function ( <mask> , req ) { if ( err ) { if ( cb ) return cb ( err ) else throw err ; } this . setState ( { request : req , page : page } ) ; } . bind ( this ) ) ; }