nl_tokens: Replaces the value of an item at the specified index returning the new iterable set
pl_tokens: function updateAt ( index , value ) { return function ( <mask> ) { return __asyncGenerator ( this , arguments , function * ( ) { var e_31 , _a ; let i = 0 ; try { for ( var source_2 = __asyncValues ( source ) , source_2_1 ; source_2_1 = yield __await ( source_2 . next ( ) ) , ! source_2_1 . done ; ) { const item = source_2_1 . value ; if ( i === index ) { yield yield __await ( value ) ; } else { yield yield __await ( item ) ; } i = i + 1 ; } } catch ( e_31_1 ) { e_31 = { error : e_31_1 } ; } finally { try { if ( source_2_1 && ! source_2_1 . done && ( _a = source_2 . return ) ) yield __await ( _a . call ( source_2 ) ) ; } finally { if ( e_31 ) throw e_31 . error ; } } } ) ; } ; }