SyncReport
What one Exporter.sync() sent.
Fields
spansnumberrequiredSpans the collector accepted in this sync.
possiblyLostEvents / possibly_lost_eventsnumberrequiredEvents of deleted threads this exporter may never have sent (an upper bound), reported in this sync.
skippedreadonly SkippedBranch[]requiredBranches that could not be read this sync. Each is retried with back-off (1 s doubling to 1 h), sooner when its head moves; the others are exported as usual.