code: func AddCommand(cmd string, format int, post PostProcessor, desc, usage string) {
  	pprofCommands[cmd] = &command{format, post, nil, false, desc, usage}
  }
docs: // AddCommand adds an additional command to the set of commands
  // accepted by pprof. This enables extensions to add new commands for
  // specialized visualization formats. If the command specified already
  // exists, it is overwritten.