AppendUserToTrace includes identifier of user that would be attached to span in datadog.

CreateNestedTrace will fork parent tracer to attach to parent one with new operation and resource from sourceCtx.

LogFieldsWithTrace will log message by logger.Level with trace if it's present in context.Context.

LogWithTrace will log message by logger.Level with trace if it's present in context.Context.

OverrideTraceResourceName set custom resource name for traced span aka SQL Query, Request, I/O etc.