Trace_core.CollectorSourceA global collector.
The collector, if present, is responsible for collecting messages and spans, and storing them, recording them, forward them, or offering them to other services and processes.
A fake span that never emits data. All collectors should handle this span by doing nothing.
type t = | C_noneNo collector.
*)| C_some : 'st * 'st Callbacks.t -> tCollector with a state and some callbacks.
*)Definition of a collector.
This is only relevant to implementors of tracing backends; to instrument your code you only need to look at the Trace module.
The definition changed since NEXT_RELEASE to a record of callbacks + a state