nl_tokens: Remove a model or a list of models from the set .
pl_tokens: function ( models , options ) { options = _ . extend ( { } , options ) ; var singular = ! _ . isArray ( models ) ; models = singular ? [ models ] : _ . clone ( models ) ; var removed = this . _removeModels ( models , options ) ; if ( ! options . silent && removed ) this . trigger ( 'update' , this , <mask> ) ; return singular ? removed [ 0 ] : removed ; }