leakcanary-object-watcher/leakcanary/KeyedWeakReference

KeyedWeakReference

class KeyedWeakReference(referent: Any, key: String, description: String, watchUptimeMillis: Long, referenceQueue: ReferenceQueue<Any>) : WeakReference<Any>

A weak reference used by ObjectWatcher to determine which objects become weakly reachable and which don't. ObjectWatcher uses key to keep track of KeyedWeakReference instances that haven't made it into the associated ReferenceQueue yet.

heapDumpUptimeMillis should be set with the current time from Clock.uptimeMillis right before dumping the heap, so that we can later determine how long an object was retained.