/streamz help
Streamz Root:
Streamz ManuallySampledMetrics set:
Root name: <default> [(+) labels] [(+) collection] [(+) largest exported metrics]
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/build/info (eyes only, public): string = 
rbex-enqueue-targets@oqs20.prod.google.com:/google/src/cloud/buildrabbit-username/buildrabbit-client/google3

Who built the binary and where it was built
defined at monitoring/streamz/internal/build_metrics.cc:115 with annotations: CONSTANT=true FOR_EYES_ONLY=true PUBLIC=true