Confusing about sub ProviderScope and dependencies

[zhxst]

I'm trying to use sub scope overrides to solve my problem. But there is Provider(..., dependencies:[]) which make me confused. The documents don't talk about it very clearly.

here is what I have in mind now:

1. If I watch providerA in providerB, the riverpod will locate providerA in the root ProviderScope directly.
2. If I use a sub ProviderScope and override providerA, I have to add providerA as a dependence of providerB. So when I watch providerA in providerB, riverpod will locate providerA in the sub ProviderScope instead of the root one.

Am I right? If I am wrong, please help me figure it out.
Thanks you.