came up with something that accomplishes my goals ...

# coroutines

[Andrew Gazelka]

came up with something that accomplishes my goals well enough

[Rajkumar Singh]

I think you don't need to do cached!! in else part. just cached should be fine.

[louiscad]

@Rajkumar Singh Would be true if it was a local variable, but it's a member variable.

[louiscad]

BTW, I think it'd be safer to use lazy { } for cached.

[Dominaezzz]

Definitely, especially since it'll prevent the race condition you currently have.