ai.stream._overlay_usage
(internal) `base` with every count `next` reports replaced: a provider reports its counts across several events, the latest value of each winning.
Reference version
Signature
function ai.stream._overlay_usage(
base: ai.events.Usage | null,
next: ai.events.Usage
) -> ai.events.Usage throws never
(internal) base with every count next reports replaced: a provider
reports its counts across several events, the latest value of each winning.
Source:<builtin>/ai/ns_stream/stream.bamlbytes 29204–29810