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PushTelemetryRequest {
	ClientInstanceId string 			// client.id + “-” + UUID4 unique for this client instance.
										// Must be set to Null on the first request, and to the
										// returned ClientInstanceId from the first response
										// for all subsequent requests to any broker.
	Terminating bool					// Client is terminating.
	ContentType string					// “application/x-protobuf”protobuf;oltpversion=0.7” or “application/x-protobuf+zstd”zstd;oltpversion=0.7”
	Metrics binary						// Format specified by ContentType, possibly compressed.
}

PushTelemetryResponse {
	ThrottleTime int32					// Standard and metric-specific throttling
	ErrorCode int16						// Error code
	ClientInstanceId string				// Will be set to a generated unique id if the
										// request ClientInstanceId was Null, else
										// this field will be set to Null.
	AcceptedContentTypes Array[string]	// Accepted metric formats.
                                       	// Only returned if Request.ContentType is null
								      	// or empty, or ErrorCode is set to
								      	// UnsupportedFormat(?).
										// Also includes the supported compression types.
	NextPushMs int32					// Delay until next PushTelemetry
	RequestedMetrics Array[string]		// Requested Metrics prefix string match.
										// Empty array: No metrics subscribed.
										// Array[0] empty string: All metrics subscribed.
										// Array[..]: prefix string match
}