code: public static Map.Entry<String, Map<String, ?>> hideKeyboardCommand(String keyName) {
          return new AbstractMap.SimpleEntry<>(
                  HIDE_KEYBOARD, prepareArguments("keyName", keyName));
      }
docs: This method forms a {@link java.util.Map} of parameters for the
  keyboard hiding.
  
  @param keyName The button pressed by the mobile driver to attempt hiding the
  keyboard.
  @return a key-value pair. The key is the command name. The value is a
  {@link java.util.Map} command arguments.