code: public Process exec(String namespace, String name, String[] command, boolean stdin)
        throws ApiException, IOException {
      return exec(namespace, name, 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 namespace The namespace of the Pod
  @param name The name of the Pod
  @param command The command to run
  @param stdin If true, pass a stdin stream into the container