Working with Olipan can get frustrating when I need to use features that are not well documented. I consult:

https://chromium.googlesource.com/chromium/src/+/master/third_party/WebKit/Source/platform/heap/BlinkGCAPIReference.md

https://www.chromium.org/developers/blink-gc-plugin-errors

In the last couple of days, these are undocumented questions
I wrestled with:

1) Collections:
Picking the right collection can be tricky. 
Documenting which Oilpan collections exist, and their usage constraints would be great:
- what triggers finalization
- which ones can be used with WeakMember, Member

In particular, HeapLinkedHashSet is the only ordered set that works with WeakMember. It'd be great if HeapArray would suggest HeapLinkedHashSet when you try to use it with WeakMember.

2) TRACE_AFTER_DISPATCH
- when is it needed, how does it work?

3) finalizeGarbageCollectedObject
- when and why is it needed, usage exaple.