nl_tokens: Returns a promise of the count of items returned by evaluating the provided iterable
pl_tokens: async function count ( source ) { var e_33 , _a ; let i = 0 ; try { for ( var source_4 = __asyncValues ( <mask> ) , source_4_1 ; source_4_1 = await source_4 . next ( ) , ! source_4_1 . done ; ) { const it = source_4_1 . value ; ++ i ; } } catch ( e_33_1 ) { e_33 = { error : e_33_1 } ; } finally { try { if ( source_4_1 && ! source_4_1 . done && ( _a = source_4 . return ) ) await _a . call ( source_4 ) ; } finally { if ( e_33 ) throw e_33 . error ; } } return i ; }