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This includes better dependency aggregation than before. For example, you no longer need mysql to view the dependency graph, as the in-memory server supports aggregation now. Also, if you log "ca" on a root span, the associated service will show on the dependency graph on the far left. This allows you to show uninstrumented clients of note. Similarly, if you log "sa" on a leaf node, the destination will show on the far right. You'd use "sa" for uninstrumented services like databases, auth servers or cloud apis. Note: 0.5.2 uses spring boot 1.3.2