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+Protocol Buffers
+================
+
+This folder contains protocol buffers provided with gRPC ruby, and the generated
+code to them.
+
+PREREQUISITES
+-------------
+
+The code is is generated using the protoc (> 3.0.0.alpha.1) and the
+grpc_ruby_plugin. These must be installed to regenerate the IDL defined
+classes, but that's not necessary just to use them.
+
+health_check/v1alpha
+--------------------
+
+This package defines the surface of a simple health check service that gRPC
+servers may choose to implement, and provides an implementation for it. To
+re-generate the surface.
+
+```bash
+$ # (from this directory)
+$ protoc -I . grpc/health/v1alpha/health.proto \
+ --grpc_out=. \
+ --ruby_out=. \
+ --plugin=protoc-gen-grpc=`which grpc_ruby_plugin`
+```