He didn't make an 'assumption' like those ones you described. This is an artificial example of a function copying unmodified data from source to destination. T

He didn't make an 'assumption' like those ones you described. This is an artificial example of a function copying unmodified data from source to destination. There are async and await tokens in every line, because every line is doing an IO operation. I a real world app this data would be somehow processed in between, using synchronous function calls, therefore without async/await tokens.