Example of creating a new coroutine, using withContext to modify its CoroutineContext

SomeRepository.kt

class SomeRepository(private val api: SomeApi) {
  // note that the class doesn't have a CoroutineScope or CoroutineContext
  
  suspend fun getSomethingExpensive() = withContext(Dispatchers.IO) {
    // regardless of the caller, this coroutine will execute
    // with the IO dispatcher.
    api.getTheWindsOfWinter()
  }
}