Const ExperimentalInstrumentations SHOULD NOT set messaging.batch.message_count on spans that operate with a single message. When a messaging client library supports both batch and single-message API for the same operation, instrumentations SHOULD use messaging.batch.message_count for batching APIs and SHOULD NOT use it for single-message APIs.
This attribute is experimental and is subject to breaking changes in minor releases of @opentelemetry/semantic-conventions.
The number of messages sent, received, or processed in the scope of the batching operation.