anchor.diff:    * PROTO_HDRS- Name of the variable that will store the .pb.h files.
     * AddressBook.proto - The .proto file to generate code from.
   
  -[[generated-files]]
  -Generated Files
  -^^^^^^^^^^^^^^^
  +## Generated Files
   
   After the `PROTOBUF_GENERATE_CPP` function is called, you will have the above
   mentioned variables available. These will be marked as the output to a custom command
  
positive.code: More variables are defined and can be found by examining the documentation at the
  top of your `FindProtobuf.cmake` file.
  
  [[generating-protobuf]]
  Generating Source
  ^^^^^^^^^^^^^^^^^
  
  The protobuf CMake package includes a number of helper functions to make the
  code generation easier. In this example we are generating C++ source and use
  
negative.code: sudo apt-get install protobuf-compiler sudo apt-get install protobuf-compiler
  ----
  
  # Concepts
  
  ## Exported Variables
  
  The variables exported by the CMake protobuf package and used in this example include:
  
  