code: public static Map.Entry<String, Map<String, ?>> getDisplayDensityCommand() {
          return new AbstractMap.SimpleEntry<>(GET_DISPLAY_DENSITY, ImmutableMap.of());
      }
docs: This method forms a {@link Map} of parameters to
  Retrieve the display density of the Android device.
  
  @return a key-value pair. The key is the command name. The value is a
  {@link Map} command arguments.