code: @JsonIgnore
      public Set<String> getExcludedTypes() {
          if (StringUtils.isBlank(exclude)) {
              return Collections.emptySet();
          } else {
              return Sets.newHashSet(
                      Arrays.asList(
                              StringUtils.split(exclude, ",")
                      ).stream()
                              .map(StringUtils::trim)
                              .collect(Collectors.toList())
              );
          }
      }
docs: Parses the comma-separated list of excluded types.