Invalid choice 'load' in 'ros2 param'

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As I was following tutorial on ros official site about parameter, there is a part that talks about saving parameter and load it back. I do everything according to the tutorial but the error came out. It appear that ros2 param doesn't have load command. My os is ubuntu 20.04 and I installed ros2-foxy.

usage: ros2 param [-h] Call ros2 param <command> -h for more detailed usage. ... ros2 param: error: argument Call ros2 param <command> -h for more detailed usage.: invalid choice: 'load' (choose from 'delete', 'describe', 'dump', 'get', 'list', 'set')