Returns a sequence of this job's children.
A job becomes a child of this job when it is constructed with this job in its CoroutineContext or using an explicit
A parent-child relation has the following effect:
Cancellation of parent with cancel or its exceptional completion (failure) immediately cancels all its children.
Parent cannot complete until all its children are complete. Parent waits for all its children to complete in completing or cancelling state.
Uncaught exception in a child, by default, cancels parent. This applies even to children created with async and other future-like coroutine builders, even though their exceptions are caught and are encapsulated in their result. This default behavior can be overridden with SupervisorJob.