nl_tokens: Factory function that creates a closure scope around a Thenable - callback . Returns a function that can be passed to a Thenable that will resume a Context lookup once the Thenable resolves with new data adding that new data to the lookup stack .
pl_tokens: function getWithResolvedData ( ctx , cur , down ) { return function ( data ) { return ctx . push ( <mask> ) . _get ( cur , down ) ; } ; }