nl_tokens: Returns only the relevant combinations from a list of word combinations . Assumes occurrences have already been calculated .
pl_tokens: function getRelevantCombinations ( wordCombinations ) { wordCombinations = wordCombinations . <mask> ( function ( combination ) { return combination . getOccurrences ( ) !== 1 && combination . getRelevance ( ) !== 0 ; } ) ; return wordCombinations ; }