nl_tokens: Yield a new iterable sequence that applies the mapper to every item in the original
pl_tokens: function map ( mapper ) { return function ( iterable ) { return __asyncGenerator ( this , arguments , function * ( ) { var e_2 , _a ; let index = 0 ; try { for ( var iterable_1 = __asyncValues ( iterable ) , iterable_1_1 ; iterable_1_1 = yield __await ( iterable_1 . <mask> ( ) ) , ! iterable_1_1 . done ; ) { const value = iterable_1_1 . value ; yield yield __await ( mapper ( value , index ) ) ; index = index + 1 ; } } catch ( e_2_1 ) { e_2 = { error : e_2_1 } ; } finally { try { if ( iterable_1_1 && ! iterable_1_1 . done && ( _a = iterable_1 . return ) ) yield __await ( _a . call ( iterable_1 ) ) ; } finally { if ( e_2 ) throw e_2 . error ; } } } ) ; } ; }