nl_tokens: Returns an array of strings from categories for a given axis
pl_tokens: function getStringsFromCategories ( props , axis ) { if ( ! props . categories ) { return [ ] ; } const categories = getCategories ( props , axis ) ; const categoryStrings = categories && categories . filter ( ( val ) => typeof val === "string" ) ; return categoryStrings ? <mask> . removeUndefined ( categoryStrings ) : [ ] ; }