nl_tokens: Take only the last item in an iterable sequence
pl_tokens: async function last ( iterable ) { var e_12 , _a ; let last = undefined ; try { for ( var iterable_10 = __asyncValues ( iterable ) , iterable_10_1 ; iterable_10_1 = await iterable_10 . next ( ) , ! iterable_10_1 . done ; ) { const item = iterable_10_1 . value ; <mask> = item ; } } catch ( e_12_1 ) { e_12 = { error : e_12_1 } ; } finally { try { if ( iterable_10_1 && ! iterable_10_1 . done && ( _a = iterable_10 . return ) ) await _a . call ( iterable_10 ) ; } finally { if ( e_12 ) throw e_12 . error ; } } return last ; }