nl_tokens: Finds views by CSS3 selectors in view tree .
pl_tokens: function ( selector , context , skipFiltering ) { // quick return for #id case var match ; if ( ! context && ( match = selector . match ( idRegexp ) ) ) { var element = require ( './view' ) . byId ( match [ 1 ] ) ; return new Collection ( element ? [ element ] : [ ] ) ; } context = context || require ( './attaching' ) . Attaching . instances ( ) ; if ( <mask> . length === undefined ) { context = [ context ] ; } var tokens = Selector . tokenize ( selector ) , expr = tokens [ 0 ] , extra = tokens [ 1 ] , result = context , mapper ; while ( expr . length > 0 ) { mapper = mappers [ expr [ 0 ] ] ? mappers [ expr . shift ( ) ] : mappers [ '' ] ; result = mapper ( result ) ; if ( expr . length === 0 ) { break ; } result = Selector . reduce ( expr . shift ( ) , result ) ; } if ( extra ) { result = result . concat ( Selector . find ( extra , context , true ) ) ; } return skipFiltering ? result : new Collection ( utils . unique ( result ) ) ; }