code: public Process exec(V1Pod pod, String[] command, boolean stdin) throws ApiException, IOException {
      return exec(pod, command, null, stdin, false);
    }
docs: Execute a command in a container. If there are multiple containers in the pod, uses the first
  container in the Pod.
  
  @param pod The pod where the command is run.
  @param command The command to run
  @param stdin If true, pass a stdin stream into the container