code: public Map<String, Object> build() {
          final ImmutableMap.Builder<String, Object> builder = ImmutableMap.builder();
          ofNullable(visualize).map(x -> builder.put("visualize", x));
          return builder.build();
      }
docs: Builds a map, which is ready to be passed to the subordinated
  Appium API.
  
  @return comparison options mapping.