code: public static Map.Entry<String, Map<String, ?>> powerCapacityCommand(
              int percent) {
          return new AbstractMap.SimpleEntry<>(POWER_CAPACITY,
                  prepareArguments("percent", percent));
      }
docs: This method forms a {@link Map} of parameters for the element
  value replacement. It is used against input elements
  
  @param percent A number in range [0, 4]
  
  @return a key-value pair. The key is the command name. The value is a {@link Map} command arguments.