nl_tokens: Yield the original sequence unmodified calling the tapper on every item in the sequence
pl_tokens: function tap ( tapper ) { return function ( it ) { return __asyncGenerator ( this , arguments , function * ( ) { var e_1 , _a ; let index = 0 ; try { for ( var it_1 = __asyncValues ( it ) , it_1_1 ; it_1_1 = yield __await ( it_1 . next ( ) ) , ! it_1_1 . done ; ) { const value = it_1_1 . value ; yield __await ( tapper ( value , index ) ) ; yield yield __await ( value ) ; index = index + 1 ; } } catch ( e_1_1 ) { e_1 = { error : e_1_1 } ; } finally { try { if ( it_1_1 && ! it_1_1 . <mask> && ( _a = it_1 . return ) ) yield __await ( _a . call ( it_1 ) ) ; } finally { if ( e_1 ) throw e_1 . error ; } } } ) ; } ; }